I couldn't download your sketch from openprocessing
so can't run it because I don't have the pics

what does dmg mean? Ah, damage

i press the space bar it shots just fine but when its online i have to either hold down the space bar or move left and right to shoot at the same time

you don't need a if keyPressed within keyPressed

Also, remember you can auto-format your code with ctrl-t

you need to proof read your comments, it's "initial" etc.
Don't write  I didnt understand  or you're not sure etc.

I'm trying to figure out how make all the enemies sho(o)t at the player

I am not sure what you mean.  Do you want an enenmy at x-pos 200 when hero is at 400 also shoot at the hero diagonally? Or ist it ok for you that all shooting is going straight down? I guess straight down is ok.

Or which line numbers are you referring to?

 - I see what you mean now.
In your class Bullets (for enemy) your constructor is

1.  Bullets() {
2.     r = 8;  //All raindrop are the same zise
3.     xBullet = myEnemy.enemyX; // start with a random x location
4.     yBullet = myEnemy.enemyY; //start a little above the widnow
5.     speed = random(1, 2); //pick a random speed
6.     c = color(50, 100, 150); //color
7.   }

What you want is that each enemy (in the class enemy) has a method "shoot" which is called every 0.6 seconds or so.
When the enemy shoots he starts a new bullet (why not use an arraylist?) similar like when you press space key for the player.
You have to rewrite the constr and pass it x and y and (maybe the enemy ships color?). This is smiliar to constr in class pBullet (for player bullets).
In fact you probably could use the player Bullet class "pBullet" also for the enemy ships, only that enemy ship bullets fly down, player bullets fly up.



horizontal line of dots
Also, what disturbes me is a horizontal line of dots changing it colors. You should get rid of that. Starfield looks great.

could this be caused by

1.    starField(10, 15, 1, 1);
2.    starField(30, 40, 2, 2);
3.    starField(10, 80, 1, 1);
4.    starField(30, 120, 2, 2);
5.    starField(10, 160, 1, 1);
6.    starField(30, 210, 2, 2);
7.    starField(10, 280, 1, 1);
8.    starField(30, 350, 2, 2);
9.    starField(10, 420, 1, 1);
10.    starField(30, 470, 2, 2);
11.    starField(10, 520, 1, 1);
12.    starField(30, 590, 2, 2);
13.    starField(10, 640, 1, 1);

?
It seems redundant to iStars.
I would delete it (and related stuff like starField).


Comments
If you look at

1.  }
2. }
3. //================MAIN================================================
4. /////////////////////////Player BULLETS/////////////////////////////
5. void keyPressed() {
6.   if (key == CODED) {

comments are wrong
better:

1.  }
2. }
3. //================ End of MAIN================================================
4. ///////////////////////// Inputs /////////////////////////////
5. void keyPressed() {
6.   if (key == CODED) {

Array
Later you want to have an array of the enemies to for loop through them.

I think here:

1.   if (keyPressed)
2.   {
3.     if (key == ' ' && millis() - lastPress > 500)
4.     {
5.       pbullets.add(new pBullet(myPlayer.playerX, myPlayer.playerY-25, 5, 5));
6.     }

you forgot

1.   lastPress=millis();

like this:

1.   if (keyPressed)
2.   {
3.     if (key == ' ' && millis() - lastPress > 500)
4.     {
5.       pbullets.add(new pBullet(myPlayer.playerX, myPlayer.playerY-25, 5, 5));
6.       lastPress=millis();
7.     }

also have lastPress=millis(); at the end of setup I guess