Hi,

thanks a lot! that helped me to proceed!
if i have more questions ill say.

so, now i have this:

int footstep = 254;
int footstep1 = 0;
int footstep2 = 255;
float accelX, accelY;

//soft-body dynamics
float organicConstant = 1;

float circleRadius = 10;
 //buttons
 
 int s1x = 0;
int s1y = 0;
int s1w = 680;
int s1h = 320;
 
int s2x = 480;
int s2y = 270;
int s2w = 20;
int s2h = 20;

//center point
float centerX = 0, centerY = 0;
float radius = 1, rotAngle = -45;

 //obstacle1 properties
float rectX = 600;
float rectY = int(random(0,250));
float rectWidth = 10;
float rectHeight = 50;
float z = 100;
float speed = 5;
 //obstacle2 properties
float rectX2 = -100;
float rectY2 = int(random(0,250));
float rectWidth2 = 10;
float rectHeight2 = 50;
float z2 = 100;
float speed2 = 6;
 //obstacle3 properties
float rectX3 = -100;
float rectY3 = int(random(0,250));
float rectWidth3 = 10;
float rectHeight3 = 50;
float z3 = 100;
float speed3 = 7;
 //obstacle4 properties
float rectX4 = -100;
float rectY4 = int(random(0,250));
float rectWidth4 = 10;
float rectHeight4 = 50;
float z4 = 100;
float speed4 = 8;
//cursor easing
float x;
float y;
float targetX, targetY;
float easing = 0.05;
 //miscellaneous
 int score = 0;
 int level = 1;
 int s = 50;
 float springing = 0.0006, damping = 0.98;
 int slide = 1;
 int centX = 0;
 int centY = 0;
 //corner nodes
 int nodes =4;
 float nodeStartX[] = new float[nodes];
float nodeStartY[] = new float[nodes];
float[]nodeX = new float[nodes];
float[]nodeY = new float[nodes];
float[]angle = new float[nodes];
float[]frequency = new float[nodes];
 
 //void setup
void setup() {
  size(600, 300);
  loop();
  noStroke();
  smooth();
  int score = 0;
 
}
 //void draw
void draw() {
  redraw();
  background(51);
  fill(0);
  textSize(12);
  loop();
 
  if(slide == 1){
    gameintro();
  }
  else if(slide == 2) {
    drawGame();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 2;
      if (rectCircleIntersect(rectX, rectY, rectWidth, rectHeight, x, y, circleRadius) == true) {
        slide = 3;
      }
         if(slide == 1){
    gameintro();
  }
    }
  }
  else if(slide == 2) {
    drawGame();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 2;
      if (rectCircleIntersect(rectX2, rectY2, rectWidth2, rectHeight2, x, y, circleRadius) == true) {
        slide = 3;
       }
          if(slide == 1){
    gameintro();
  }
    }
  }
  else if(slide == 2) {
    drawGame();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 2;
      if (rectCircleIntersect(rectX3, rectY3, rectWidth3, rectHeight3, x, y, circleRadius) == true) {
        slide = 3;
        }
          if(slide == 1){
    gameintro();
  }
    }
  }
  else if(slide == 2) {
    drawGame();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 2;
      if (rectCircleIntersect(rectX4, rectY4, rectWidth4, rectHeight4, x, y, circleRadius) == true) {
        slide = 3;
        if(slide ==1){
          gameintro();
        }
      }
    }
  }
 
  if(slide == 3){
    gameOver();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 3;
 
    }
    if((overButton(s2x, s2y, s2w, s2h))) {
      slide = 2;
    }
    }
  }
 
 
boolean overButton(int x, int y, int w, int h) {
  if (mouseX > x && mouseX < x+w && mouseY > y && mouseY < y+h) {
    return true; 
  } 
  else {
    return false; 
  }
}
void mousePressed() {
  if ((slide == 1)) {
    if ((overButton(s1x, s1y, s1w, s1h)) == true) {
      slide = 2; 
      loop();
    }
    else if ((slide == 3)) {
      if ((overButton(s1x, s1y, s1w, s1h)) == true) {
        slide = 1;
      } 
 
    }
    else if ((slide == 3)) {
      if ((overButton(s2x, s2y, s2w, s2h)) == true) {
        slide = 2;
      } 
 
    }
 
  }
 
 
 
}
 
 
void drawShape() {
  //  calculate node  starting locations
  for (int i=0; i<nodes; i++){
    nodeStartX[i] = centerX+cos(radians(rotAngle))*radius;
    nodeStartY[i] = -210 + centerY+sin(radians(rotAngle))*radius *300;
    rotAngle += 360.0/nodes;
  }
 
  // draw polygon
  curveTightness(organicConstant);
  fill(0, footstep);
  beginShape();
  for (int i=0; i<nodes; i++){
    curveVertex(nodeX[i], nodeY[i]);
  }
  for (int i=0; i<nodes-1; i++){
    curveVertex(nodeX[i], nodeY[i]);
  }
  endShape(CLOSE);
 
 
}
 
void drawShape2() {
  //  calculate node  starting locations
  for (int i=0; i<nodes; i++){
    nodeStartX[i] = centerX+cos(radians(rotAngle))*radius;
    nodeStartY[i] = -210 + centerY+sin(radians(rotAngle))*radius *300;
    rotAngle += 360.0/nodes;
  }
 
  // draw polygon
  curveTightness(organicConstant);
  fill(0, footstep1);
  beginShape();
  for (int i=0; i<nodes; i++){
    curveVertex(nodeX[i], nodeY[i]);
  }
 
 
  //println("nodeX = " + nodeX[0] + " nodeStartY = " + nodeStartY[3] + "mouseX = " + mouseX + "mouseY" + mouseY);
 
  for (int i=0; i<nodes-1; i++){
    curveVertex(nodeX[i], nodeY[i]);
  }
  endShape(CLOSE);
 
 
}
 
void moveShape() {
  //move center point
 
  float deltaX = mouseX-centerX;
  float deltaY = mouseY-centerY;
 
 
 
  // create springing effect
 
  deltaX *= springing;
  deltaY *= springing;
  accelX += deltaX;
  accelY += deltaY;
 
  // move predator's center
  centerX += accelX;
  centerY += accelY;
 
  // slow down springing
  accelX *= damping;
  accelY *= damping;
 
  // change curve tightness
  organicConstant = 1-((abs(accelX)+abs(accelY))*.1);
 
  //move nodes
  for (int i=0; i<nodes; i++){
    nodeX[i] = nodeStartX[i]+sin(radians(angle[i]))*(accelX *.5);
    nodeY[i] = nodeStartY[i]+sin(radians(angle[i]))*(accelY *.5);
    angle[i]+=frequency[i];
  }
 
  centX = (int) centerX;
  centY = (int) centerY;
 
 
  //println("deltaX =" + (centX) + "mouseX" + (mouseX-10));
 
//  if((mouseX == centX) && (mouseY < centY) 
//    || (mouseX - 1 == centX) && (mouseY < centY) || 
//    (mouseX -2 == centX) && (mouseY < centY)
//    || (mouseX - 3 == centX) && (mouseY < centY) || 
//    (mouseX -4 == centX) && (mouseY < centY)
//    || (mouseX - 5 == centX) && (mouseY < centY) || 
//    (mouseX -6 == centX) && (mouseY < centY)
//    || (mouseX - 7 == centX) && (mouseY < centY) || 
//    (mouseX -8 == centX) && (mouseY < centY)) {
//    gameOver();
//    mouseX = centX;
//   
//    
//   
//
//  }
 
 
 
}
 
  void drawGame() {
  redraw();
  background(200);
  fill(0);
  textSize(12);
  text( "LEVEL: " + level, 10, 20);
  textSize(10);
  fill(0);
  text( "SCORE: " + score, 10, 35);
  //fill(255, 100);
  //rect(0,0,width, height);
  
score += 1;
 
   if(score >= 200) {
    s = 45;
    level = 2;
        rectX2 -= speed2;
   if(rectX2 < -100) {
  rectX2 = 600;
  rectY2 = int(random(0,250));
   }
 
    if( score >= 400) {
      s = 40;
      level = 3;
        rectX3 -= speed3;
        if(rectX3 < -50) {
          rectX3 = 650;
          rectY3 = int(random(0,250));
    }
    }
   
    if( score >= 600) {
      s = 35;
      level = 4;
      rectX4 -= speed4;
        if(rectX4 < -75) {
          rectX4 = 650;
          rectY4 = int(random(0,250));
    }
    }
    if( score >= 700) {
      s = 30;
      level = 5;
      springing = .0010;
 
    }
    if( score >= 1100) {
      s = 25;
      level = 6;
      springing = .00105;
    }
    if( score >= 1500) {
      s = 20;
      level = 7;
      springing = .0011;
    }
    if( score >= 2000) {
      s = 15;
      level = 8;
      springing = .00115;
    }
    if( score >= 2600) {
      s = 10;
      level = 9;
      springing = .0012;
    }
    if( score >= 3250) {
      s = 5;
      level = 10;
      springing = .00125;
    }
  }
 
 //cursor easing properties in void draw
   targetX = mouseX;
  float dx = targetX - x;
  if(abs(dx) > 1) {
    x += dx * easing;
  }
 
  targetY = mouseY;
  float dy = targetY - y;
  if(abs(dy) > 1) {
    y += dy * easing;
  }
  //decrease value to move obstacles from right to left and appear again ramdomly on the right
   rectX -= speed;
   if(rectX < 0) {
  rectX = 600;
  rectY = int(random(0,250));
   }
  //collision between player(circle) and obstacle1
  if (rectCircleIntersect(rectX, rectY, rectWidth, rectHeight, x, y, circleRadius) == true) {
    gameOver();
  }
  else {
    fill(255);
  }
 
  rect(rectX, rectY, rectWidth, rectHeight);
  ellipse(x, y, 33, 33);
 
  //collision between player(circle) and obstacle2
  if (rectCircleIntersect(rectX2, rectY2, rectWidth2, rectHeight2, x, y, circleRadius) == true) {
    gameOver();
  }
  else {
    fill(255);
  }
 
  rect(rectX2, rectY2, rectWidth2, rectHeight2);
  ellipse(x, y, 33, 33);

  //collision between player(circle) and obstacle3
  if (rectCircleIntersect(rectX3, rectY3, rectWidth3, rectHeight3, x, y, circleRadius) == true) {
    gameOver();
  }
  else {
    fill(255);
  }
 
  rect(rectX3, rectY3, rectWidth3, rectHeight3);
  ellipse(x, y, 33, 33);
 
    //collision between player(circle) and obstacle4
  if (rectCircleIntersect(rectX4, rectY4, rectWidth4, rectHeight4, x, y, circleRadius) == true) {
    gameOver();
  }
  else {
    fill(255);
  }
 
  rect(rectX4, rectY4, rectWidth4, rectHeight4);
  ellipse(x, y, 33, 33);
 
}
 
 
boolean rectCircleIntersect(float rx, float ry, float rw, float rh, float cx, float cy, float cr) {
 
  float circleDistanceX = abs(cx - rx - rw/2);
  float circleDistanceY = abs(cy - ry - rh/2);
 
  if (circleDistanceX > (rw/2 + cr)) { return false; }
  if (circleDistanceY > (rh/2 + cr)) { return false; }
  if (circleDistanceX <= rw/2) { return true; }
  if (circleDistanceY <= rh/2) { return true; }
 
  float cornerDistance = pow(circleDistanceX - rw/2, 2) + pow(circleDistanceY - rh/2, 2);
  return cornerDistance <= pow(cr, 2);
}

void gameintro() {
  background(200);
  fill(255);
  stroke(0);
  fill(0);
  strokeWeight(1);
  textSize(16);
  text( " Circlavoider by Rui Rela ", 50,100);
  text( " Avoid the obstacles ", 50, 200);
  text( " Try to survive the longest you can ", 80, 230);
  text( " Click anywhere to start  :) ", 400, 275);
  line( 400, 0, 400, 210);
  stroke(0, 50);
  line( 410, 0, 410, 210);
  fill(0,0);
  rect(s1x, s1y, s1w, s1h);
 
 
 
 
}
 
void gameOver() {
  redraw();
  background(200);
  fill(255);
  stroke(0);
    fill(255,0,0);
  rect(480,270,20,20);
  //ellipse(270, 195, 25, 25);
  fill(0);
  strokeWeight(1);
  textSize(16);
  text( "GAME OVER", 50, height/2);
  text( ":'(", 50, 200);
//  text( "SCORE: " + score, 50, 200);
//  text( "LEVEL: " + level, 50, 220);
  text( "MOUSE ROLLOVER HERE TO RESTART ", 300, 250);
  line( 400, 0, 400, 210);
  stroke(0, 50);
  line( 410, 0, 410, 210);
  fill(0,0);
  //stroke(0,0);
  stroke(0, 0);
  rect(s2x, s2y, s2w, s2h);
  score = 0;
  rectX2 = -100;
  rectX3 = -100;
    rectX4 = -100;
  level = 1; 
  s = 50;
  springing = .0006;
  }
  //delay(500000);

and i have another problem: only obstacle1 goes to gameover, other rectangles go to gameover for a sec, because is only when they touch the circle...whats missing?
(and I prefered not to create a class, I prefer doing like this)

I'm screaming at you inside my head, and I'm probably not alone.

Ok, I cleaned some unecessary "trash code" from the other game:

• 
  float circleRadius = 10;
   //buttons
   
   int s1x = 0;
  int s1y = 0;
  int s1w = 680;
  int s1h = 320;
   
  int s2x = 480;
  int s2y = 270;
  int s2w = 20;
  int s2h = 20;
  
   //obstacle1 properties
  float rectX = 600;
  float rectY = int(random(0,250));
  float rectWidth = 10;
  float rectHeight = 30;
  float z = 100;
  float speed = 3;
   //obstacle2 properties
  float rectX2 = -100;
  float rectY2 = int(random(0,250));
  float rectWidth2 = 10;
  float rectHeight2 = 30;
  float z2 = 100;
  float speed2 = 5;
   //obstacle3 properties
  float rectX3 = -100;
  float rectY3 = int(random(0,250));
  float rectWidth3 = 10;
  float rectHeight3 = 30;
  float z3 = 100;
  float speed3 = 7;
   //obstacle4 properties
  float rectX4 = -100;
  float rectY4 = int(random(0,250));
  float rectWidth4 = 10;
  float rectHeight4 =30;
  float z4 = 100;
  float speed4 = 9;
   //obstacle5 properties
  float rectX5 = -100;
  float rectY5 = int(random(0,250));
  float rectWidth5 = 10;
  float rectHeight5 = 30;
  float z5 = 100;
  float speed5 = 11;
   //obstacle6 properties
  float rectX6 = -100;
  float rectY6 = int(random(0,250));
  float rectWidth6 = 10;
  float rectHeight6 = 30;
  float z6 = 100;
  float speed6 = 12;
   //obstacle7 properties
  float rectX7 = -100;
  float rectY7 = int(random(0,250));
  float rectWidth7 = 10;
  float rectHeight7 = 30;
  float z7 = 100;
  float speed7 = 13;
   //obstacle8 properties
  float rectX8 = -100;
  float rectY8 = int(random(0,250));
  float rectWidth8 = 10;
  float rectHeight8 = 30;
  float z8 = 100;
  float speed8 = 14;
   //obstacle9 properties
  float rectX9 = -100;
  float rectY9 = int(random(0,250));
  float rectWidth9 = 10;
  float rectHeight9 = 30;
  float z9 = 100;
  float speed9 = 15;
   //obstacle10 properties
  float rectX10 = -100;
  float rectY10 = int(random(0,250));
  float rectWidth10 = 10;
  float rectHeight10 = 30;
  float z10 = 100;
  float speed10 = 20;
  //cursor easing
  float x;
  float y;
  float targetX, targetY;
  float easing = 0.05;
   //miscellaneous
   int score = 0;
   int level = 1;
   int s = 50;
   int slide = 1;
   int centX = 0;
   int centY = 0;
   
   //void setup
  void setup() {
    size(600, 300);
    loop();
    noStroke();
    smooth();
    int score = 0;
   
  }
   //void draw
  void draw() {
    redraw();
    background(51);
    fill(0);
    textSize(12);
    loop();
   
    if(slide == 1){
      gameintro();
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX, rectY, rectWidth, rectHeight, x, y, circleRadius) == true) {
          slide = 3;
        }
           if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX2, rectY2, rectWidth2, rectHeight2, x, y, circleRadius) == true) {
          slide = 3;
         }
            if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX3, rectY3, rectWidth3, rectHeight3, x, y, circleRadius) == true) {
          slide = 3;
          }
            if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX4, rectY4, rectWidth4, rectHeight4, x, y, circleRadius) == true) {
          slide = 3;
        if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX5, rectY5, rectWidth5, rectHeight5, x, y, circleRadius) == true) {
          slide = 3;
         }
         if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX6, rectY6, rectWidth6, rectHeight6, x, y, circleRadius) == true) {
          slide = 3;
         }
         if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX7, rectY7, rectWidth7, rectHeight7, x, y, circleRadius) == true) {
          slide = 3;
         }
         if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX8, rectY8, rectWidth8, rectHeight8, x, y, circleRadius) == true) {
          slide = 3;
         }
         if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX9, rectY9, rectWidth9, rectHeight9, x, y, circleRadius) == true) {
          slide = 3;
         }
         if(slide == 1){
      gameintro();
    }
      }
    }
    else if(slide == 2) {
      drawGame();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 2;
        if (rectCircleIntersect(rectX10, rectY10, rectWidth10, rectHeight10, x, y, circleRadius) == true) {
          slide = 3;
         }
        
          if(slide ==1){
            gameintro();
          }
        }
      }
    }
   
    if(slide == 3){
      gameOver();
      if((overButton(s1x, s1y, s1w, s1h))) {
        slide = 3;
   
      }
      if((overButton(s2x, s2y, s2w, s2h))) {
        slide = 2;
      }
      }
    }
   
   
  boolean overButton(int x, int y, int w, int h) {
    if (mouseX > x && mouseX < x+w && mouseY > y && mouseY < y+h) {
      return true; 
    } 
    else {
      return false; 
    }
  }
  void mousePressed() {
    if ((slide == 1)) {
      if ((overButton(s1x, s1y, s1w, s1h)) == true) {
        slide = 2; 
        loop();
      }
      else if ((slide == 3)) {
        if ((overButton(s1x, s1y, s1w, s1h)) == true) {
          slide = 1;
        } 
   
      }
      else if ((slide == 3)) {
        if ((overButton(s2x, s2y, s2w, s2h)) == true) {
          slide = 2;
        } 
   
      }
   
    }
   
   
   
  }
   
    void drawGame() {
    redraw();
    background(200);
    fill(0);
    textSize(12);
    text( "LEVEL: " + level, 10, 20);
    textSize(10);
    fill(0);
    text( "SCORE: " + score, 10, 35);
    //fill(255, 100);
    //rect(0,0,width, height);
    
  score += 1;
   
     if(score >= 200) {
      s = 45;
      level = 2;
          rectX2 -= speed2;
     if(rectX2 < -100) {
    rectX2 = 600;
    rectY2 = int(random(0,250));
     }
   
      if( score >= 400) {
        s = 40;
        level = 3;
          rectX3 -= speed3;
          if(rectX3 < -50) {
            rectX3 = 650;
            rectY3 = int(random(0,250));
      }
      }
     
      if( score >= 600) {
        s = 35;
        level = 4;
        rectX4 -= speed4;
          if(rectX4 < -75) {
            rectX4 = 650;
            rectY4 = int(random(0,250));
      }
      }
      if( score >= 800) {
        s = 30;
        level = 5;
         rectX5 -= speed3;
          if(rectX5 < -50) {
            rectX5 = 650;
            rectY5 = int(random(0,250));
      }
      }
      if( score >= 1000) {
        s = 25;
        level = 6;
         rectX6 -= speed3;
          if(rectX6 < -50) {
            rectX6 = 650;
            rectY6 = int(random(0,250));
      }
      }
      if( score >= 1200) {
        s = 20;
        level = 7;
         rectX7 -= speed3;
          if(rectX7 < -50) {
            rectX7 = 650;
            rectY7 = int(random(0,250));
      }
      }
      if( score >= 1400) {
        s = 15;
        level = 8;
         rectX8 -= speed3;
          if(rectX8 < -50) {
            rectX8 = 650;
            rectY8 = int(random(0,250));
      }
      }
      if( score >= 1600) {
        s = 10;
        level = 9;
         rectX9 -= speed3;
          if(rectX9 < -50) {
            rectX9 = 650;
            rectY9 = int(random(0,250));
      }
      }
      if( score >= 1800) {
        s = 5;
        level = 10;
         rectX10 -= speed3;
          if(rectX10 < -50) {
            rectX10 = 650;
            rectY10 = int(random(0,250));
      }
      }
    }
   
   //cursor easing properties in void draw
     targetX = mouseX;
    float dx = targetX - x;
    if(abs(dx) > 1) {
      x += dx * easing;
    }
   
    targetY = mouseY;
    float dy = targetY - y;
    if(abs(dy) > 1) {
      y += dy * easing;
    }
    //decrease value to move obstacles from right to left and appear again ramdomly on the right
     rectX -= speed;
     if(rectX < 0) {
    rectX = 600;
    rectY = int(random(0,250));
     }
    //collision between player(circle) and obstacle1
    if (rectCircleIntersect(rectX, rectY, rectWidth, rectHeight, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX, rectY, rectWidth, rectHeight);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle2
    if (rectCircleIntersect(rectX2, rectY2, rectWidth2, rectHeight2, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX2, rectY2, rectWidth2, rectHeight2);
    ellipse(x, y, 33, 33);
  
    //collision between player(circle) and obstacle3
    if (rectCircleIntersect(rectX3, rectY3, rectWidth3, rectHeight3, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX3, rectY3, rectWidth3, rectHeight3);
    ellipse(x, y, 33, 33);
   
      //collision between player(circle) and obstacle4
    if (rectCircleIntersect(rectX4, rectY4, rectWidth4, rectHeight4, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX4, rectY4, rectWidth4, rectHeight4);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle5
    if (rectCircleIntersect(rectX5, rectY5, rectWidth5, rectHeight5, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX5, rectY5, rectWidth5, rectHeight5);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle6
    if (rectCircleIntersect(rectX6, rectY6, rectWidth6, rectHeight6, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX6, rectY6, rectWidth6, rectHeight6);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle7
    if (rectCircleIntersect(rectX7, rectY7, rectWidth7, rectHeight7, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX7, rectY7, rectWidth7, rectHeight7);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle8
    if (rectCircleIntersect(rectX8, rectY8, rectWidth8, rectHeight8, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX8, rectY8, rectWidth8, rectHeight8);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle9
    if (rectCircleIntersect(rectX9, rectY9, rectWidth9, rectHeight9, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX9, rectY9, rectWidth9, rectHeight9);
    ellipse(x, y, 33, 33);
   
    //collision between player(circle) and obstacle10
    if (rectCircleIntersect(rectX10, rectY10, rectWidth10, rectHeight10, x, y, circleRadius) == true) {
      gameOver();
    }
    else {
      fill(255);
    }
   
    rect(rectX10, rectY10, rectWidth10, rectHeight10);
    ellipse(x, y, 33, 33);
   
  }
   
   
  boolean rectCircleIntersect(float rx, float ry, float rw, float rh, float cx, float cy, float cr) {
   
    float circleDistanceX = abs(cx - rx - rw/2);
    float circleDistanceY = abs(cy - ry - rh/2);
   
    if (circleDistanceX > (rw/2 + cr)) { return false; }
    if (circleDistanceY > (rh/2 + cr)) { return false; }
    if (circleDistanceX <= rw/2) { return true; }
    if (circleDistanceY <= rh/2) { return true; }
   
    float cornerDistance = pow(circleDistanceX - rw/2, 2) + pow(circleDistanceY - rh/2, 2);
    return cornerDistance <= pow(cr, 2);
  }
  
  void gameintro() {
    background(200);
    fill(255);
    stroke(0);
    fill(0);
    strokeWeight(1);
    textSize(16);
    text( " Circlavoider by Rui Rela ", 50,100);
    text( " Avoid the obstacles ", 50, 200);
    text( " Try to survive the longest you can ", 80, 230);
    text( " Click anywhere to start  :) ", 400, 275);
    line( 400, 0, 400, 210);
    stroke(0, 50);
    line( 410, 0, 410, 210);
    fill(0,0);
    rect(s1x, s1y, s1w, s1h);
   
   
   
   
  }
   
  void gameOver() {
    redraw();
    background(200);
    fill(255);
    stroke(0);
      fill(255,0,0);
    rect(480,270,20,20);
    //ellipse(270, 195, 25, 25);
    fill(0);
    strokeWeight(1);
    textSize(16);
    text( "GAME OVER", 50, height/2);
    text( ":'(", 50, 200);
  //  text( "SCORE: " + score, 50, 200);
  //  text( "LEVEL: " + level, 50, 220);
    text( "MOUSE ROLLOVER HERE TO RESTART ", 300, 250);
    line( 400, 0, 400, 210);
    stroke(0, 50);
    line( 410, 0, 410, 210);
    fill(0,0);
    //stroke(0,0);
    stroke(0, 0);
    rect(s2x, s2y, s2w, s2h);
    score = 0;
    rectX2 = -100;
    rectX3 = -100;
      rectX4 = -100;
        rectX5 = -100;
          rectX6 = -100;
            rectX7 = -100;
              rectX8 = -100;
                rectX9 = -100;
                  rectX10 = -100;
    level = 1; 
    s = 50;
    }
    //delay(500000);
  

If you don't use classes, learn to use arrays, at least...
Great games have been made in C and other languages without classes, but they always used arrays!

NUM_RECTANGLES is just a constant.

Good!

jesus christ my head is burning, I cant create another rectangle from the class..............................and i didnt slept im .... dead...

here is what i have now...

float circleRadius = 10;
 
 //button1
 int s1x = 0;
int s1y = 0;
int s1w = 680;
int s1h = 320;
 
 //"game over button"
 //rect(26, 147, 33, 33);
int s2x = 26;
int s2y = 147;
int s2w = 33;
int s2h = 33;

//background properties
float p = 0;
float speedIMG = 0.2;

//stars properties
float[] k = new float[3000];  //array definition

 //obstacle properties
float rectX = 600;
float rectY = int(random(0,250));
float rectWidth = 10;
float rectHeight = 75;
float z = 100;
float speed = 3;
//cursor easing
float x;
float y;
float targetX, targetY;
float easing = 0.05;
 //miscellaneous
 int score = 0;
 int level = 1;
 int slide = 1;
 //images
 PImage img;
 PImage img2;
 PImage img3;

 //void setup
void setup() {
  size(600, 300);
  cursor(HAND);
  frameRate(60);
  img = loadImage("imagem1.jpg");
  img2 = loadImage("imagem2.png");
  img3 = loadImage("stars.jpg");
  loop();
  noStroke();
  smooth();
    fill(255, 200);
 
  for (int i = 0; i < k.length; i++)
  {
    k[i] = random(0, 600);
  }
  int score = 0;
  }
 //void draw
void draw() {
  redraw();
  background(51);
  fill(0);
  textSize(12);
  loop();



 
  if(slide == 1){
    gameintro();
  }
  else if(slide == 2) {
    drawGame();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 2;
      if (rectCircleIntersect(rectX, rectY, rectWidth, rectHeight, x, y, circleRadius) == true) {
        slide = 3;
      }
        if(slide ==1){
          gameintro();
       
      }
    }
  }
 
  if(slide == 3){
    gameOver();
    if((overButton(s1x, s1y, s1w, s1h))) {
      slide = 3;
 
    }
    if((overButton(s2x, s2y, s2w, s2h))) {
      slide = 2;
      score = 0;
    }
    }
  }
 
 
boolean overButton(int x, int y, int w, int h) {
  if (mouseX > x && mouseX < x+w && mouseY > y && mouseY < y+h) {
    return true; 
  } 
  else {
    return false; 
  }
}
void mousePressed() {
  if ((slide == 1)) {
    if ((overButton(s1x, s1y, s1w, s1h)) == true) {
      slide = 2;
      loop();
    }
    else if ((slide == 3)) {
      if ((overButton(s1x, s1y, s1w, s1h)) == true) {
        slide = 1;
      } 
 
    }
    else if ((slide == 3)) {
      if ((overButton(s2x, s2y, s2w, s2h)) == true) {
        slide = 2;
      } 
 
    }
 
  }
 
 
 
}
 
  void drawGame() {
  redraw();
  background(51);
  image(img3, p, 0);
  fill(255);
  textSize(12);
  text( "LEVEL: " + level, 10, 20);
  textSize(10);
  fill(255);
  text( "SCORE: " + score, 10, 35);

  //fill(255, 100);
  //rect(0,0,width, height);
  
score += 1;
 
       if(score >= 0) {
    level = 1;
        rectX -= speed;
   if(rectX < -100) {
  rectX = 600;
  rectY = int(random(0,250));
   }
  p -=speedIMG;
  if (p<-6000) {
    p = 0;
   }
       }
 
   if(score >= 200) {
    level = 2;
   }
  
 
    if( score >= 400) {
      level = 3;
    }
   
   
    if( score >= 600) {
      level = 4;
    }
   
    if( score >= 800) {
      level = 5;
    }
   
    if( score >= 1000) {
      level = 6;
    }
   
    if( score >= 1200) {
      level = 7;
    }
   
      if( score >= 1400) {
      level = 8;
    }
  
   
    if( score >= 1600) {
      level = 9;
   
    }
    if( score >= 1800) {
      level = 10;
    }
 
 
 //cursor easing properties in void draw
   targetX = mouseX;
  float dx = targetX - x;
  if(abs(dx) > 1) {
    x += dx * easing;
  }
 
  targetY = mouseY;
  float dy = targetY - y;
  if(abs(dy) > 1) {
    y += dy * easing;
  }
  //decrease value to move obstacles from right to left and appear again ramdomly on the right

  //collision between player(circle) and obstacle1
  if (rectCircleIntersect(rectX, rectY, rectWidth, rectHeight, x, y, circleRadius) == true) {
    gameOver();
  }
  else {
    fill(255);
  }
 
  rect(rectX, rectY, rectWidth, rectHeight);
  fill(255);
  ellipse(x,y,33,33);
}
 
 
boolean rectCircleIntersect(float rx, float ry, float rw, float rh, float cx, float cy, float cr) {
 
  float circleDistanceX = abs(cx - rx - rw/2);
  float circleDistanceY = abs(cy - ry - rh/2);
 
  if (circleDistanceX > (rw/2 + cr)) { return false; }
  if (circleDistanceY > (rh/2 + cr)) { return false; }
  if (circleDistanceX <= rw/2) { return true; }
  if (circleDistanceY <= rh/2) { return true; }
 
  float cornerDistance = pow(circleDistanceX - rw/2, 2) + pow(circleDistanceY - rh/2, 2);
  return cornerDistance <= pow(cr, 2);
}

void gameintro() {
  image(img, 0, 0);
 
}
 
void gameOver() {
  image(img2, 0, 0);
    textSize(15);
  fill(255);
  text( "FINAL SCORE: " + score, 205,100);
  level = 1;
  p = 0;
 
  if(score <= 100) {
    textSize(15);
  fill(255);
  text( "Are you trying to lose the fast as possible? LOL loser!", 115,150); ;
   }    
      else if( score <= 2000) {
      textSize(15);
  fill(255);
  text( score + " It's not very much, seriously, try again!", 145,150); ;
    }
        else if( score <= 5000) {
      textSize(15);
  fill(255);
  text( "Nice score! " + score + "! But can you do more than that?", 135,150); ;
    }
        else if( score <= 7500) {
      textSize(15);
  fill(255);
  text( "You have nice skills! But not quite so impressive.", 135,150); ;
    }
        else if( score <= 10000) {
      textSize(15);
  fill(255);
  text( score + ", Ok...you are quite skilled hein???", 185,150); ;
    }
        else if( score <= 15000) {
      textSize(15);
  fill(255);
  text( "Jesus Christ, how many hours you spend a day in front of a computer?", 80,150); ;
    }
        else if( score <= 20000) {
      textSize(15);
  fill(255);
  text( "OMG you have MAD SKILLS DUDE!!!", 215,150); ;
    }
           else if( score > 20000) {
      textSize(20);
  fill(255);
  text( score + " !!! UNBELIEVABLE!!!!!", 100,125); ;
    text( "CONGRATULATIONS, YOU ARE VERY GOOD", 115,145); ;
    text( "This is the BEST comment you can get!!! :D", 130,165); ;
        text( "THANKS FOR PLAYING ;)", 145,185); ;
}
}
  //delay(500000);