Hi, I'm triying to make a simple game that user controls right, and left arrow keys to avoid randomly falling objects from the top of the screen.  As for object's random falling, I tried both Arraylist and just simple array that has preseted size, but it's not working and totally have no idea what to do.

Here's my code below, and just need help..T-T
 
//algorithm: avoide falling germs controlling hand's move using left, right arrow keys
 
Germ []germ;
int totalGerms=0;

int cnt;
Hand hand;
Hand hand1;
Page page;

void setup(){
  size(500,700);
  smooth();
  noStroke();
 
  page = new Page();  
  germ=new Germ[1000];
   hand = new Hand("h1.png", width/3, height-75);
      if(totalGerms<germ.length){
                    germ[totalGerms]=new Germ();
                    totalGerms++;
               }
  // hand1 = new Hand("h1 germ.png",hand.posX,hand.posY);
}


void draw(){
  page.firstPage();
  if(page.game){  
       int t=(7000-millis())/1000; //if 5 secs passed then germs fall
       if(t>0){
           text(t, width/2, height/2);
         }
        page.displayPage();
        if((t==0) || (t<0)){
            
                    for(int i=0; i<totalGerms; i++){
                       if(!germ[i].finished){
                         germ[i].fall();
                     
                
                        if(germ[i].reachBottom()){
                         germ[i].finished();
                         }
                        
                    }   
               }
                  hand.display();
                         hand.move();
        }
        }
  }

 
             //   if (hand.meetGerm()){ //if hand intersects with germ
              //    gs.germInfect(hand); //hand turns in purple(actually, i've got a purple hand img)       
             //   }
 
    /*
    if(hand.infect(germ[i])){
        println("dead");
        hand = new Hand("h1 germ.png",hand.posX,hand.posY);
    }
 */
         //}



 

class Germ{
  
 
  float xPos, yPos;
  float gravity;
  float speed;
  PImage img;
 
  boolean finished = false;

  Germ(){
  
    xPos = random(0,width-40);//initially located at random x within the boundary
    yPos = -100; //hide germ before the game starts -100
    gravity=0.07;
    speed=random(-2,2);
    img  = loadImage("t5.gif");//136 *109
    

  }

 
  void fall(){
  speed += gravity;
  yPos += speed;
  image(img,xPos,yPos);
  }
 
  boolean reachBottom(){
        if(yPos > height){
       return true;
      }
    else
      return false;
  }
 
  void finished(){
    finished=true;
      }
  }


class Hand{
 
 float posX;
 float posY;//position of hand
 int lives;
 PImage hImage;
 
 
Hand(String filename, float x, float y){
 posX= x;
 posY=y;
 lives=3;
 hImage = loadImage(filename);
 
 }
 

void display(){
   posX= constrain(posX,0,width-75);
   translate(posX,posY);
  
   image(hImage,0,0,80,80);

 }
 
 /*
 
  boolean meetGerm(){
 
    float area = dist(posX, posY, xPos , yPos); //the range of intersection
   
    if (area <40){
      lives--;
      return true;
     
    }
    else{
      return false;
    }
  
 }
*/
 
  void move(){ //function of left arrow and right arrow
   if (keyPressed && (key == CODED)) //using coded key
   {
       if(keyCode == LEFT){
          
           hand.posX-=4;
         }
    
         else if (keyCode == RIGHT){
           hand.posX+=4;
         }
     }
  }
}





class Page{
  boolean game;
  int score;
  int stage;
  int lives;
  PFont font;
 
  PImage button;
  PImage img;
  Hand hand;
 
  Page(){
    game=false;
    score=0;
    stage=1;
    lives=3;
    font = loadFont("ARCARTER-48.vlw");
    img=loadImage("germ.jpg");
    }
   
 
   void firstPage(){
      background(255);
      image(img,width*3/4,height*2/3);
      fill(0,0,255);//font color
      textFont(font,50);
      textAlign(CENTER);
      text("First page!!", width/2,height/2);
      textFont(font,30);
      text("Press Enter to start game",width/2,height/2-80);
      if (keyPressed && (key == ENTER)){          
                 game=true;
            }
   }
        /*
        if(mousePressed){
          if(mouseButton==LEFT)
          {
          }
        }
        */
 
    
 
   void displayPage(){
    
     background(0); //black bg color
     int t=(7000-millis())/1000; //if 5 secs passed then germs fall
       if(t>0){
     
           text(t, width/2, height/2);
       }
      
      
     fill(255,255,255);
     textFont(font,23);
     textAlign(LEFT);
     text("Stage: ", width/20,height/15);
  
    text("Score: ", width/20,height*2/15);
    text(int(stage),width/20+60, height/15);
    text(int(score), width/20+60, height*2/15);
    strokeWeight(2);
  
    stroke(0,255,0);
    line(0,9*height/10+20,width,9*height/10+20);
   
    fill(255,0,0);
    text("Lives: ", width-100,height/15);
    text(int(lives), width-100+50, height/15);
     }
  
   
   
    void show(){
     // if(hand.infect()){
        fill(255,0,30);
        textAlign(CENTER);
        text("GERM INFECTED!", width/2, height/2-50);
  
        }
 
   
    void gameOverPage(){
      background(255);
      textFont(font,50);
      textAlign(CENTER);
      text("Game Over", width/2,height/2);
     }
   

    }