Pseudo

Player:

player class{ construct set up xpos,ypos,width, height, src(for image),sourceX, sourceY,sourceWidth, sourceHeight,xSpeed } drawimage{ src,sx,sy,sw,sh,x,y,w,h }

player move

if player pressed left key{ x -= xspeed if x is less than 0{ x = canvas width } }(same but opposite for right key pressed)

enemy has hit a me

for Each enemy bullet if has hit enemy { if enemy bullet y pos + ebullet height greater than player ypos{ lives -1 } collided = true } return collided

Enemy

enemy class xpos,ypos,width, height, src(for image),sourceX, sourceY,sourceWidth, sourceHeight,xSpeed, delay, delayrate

draw enemy src,sx,sy,sw,sh,x,y,w,h

enemy move delay + delay rate if delay % 3 = 0 & delay != 0 { x + xspeed delay = 0 }

dropdown xspeed *= -1 y+= h x += xspeed

make enemies variable set up, src,x,y,w,h,sx,sy,xs new enemy(src,sx,sy,sw,sh,x,y,w,h,xs,delay)

push enemy into array

Bullet

bullet class construct xpos,ypos,width, height, colour,xSpeed,

draw bullet fill = colour rect = x,y,w,h

bullet move y-=ySpeed

outof screen return y less than 0 or y is greater than canvas height

has hit enemy return x+w > ex & ex < y+w & y < ey & y < ey + eh

collision for each enemy if hit{ delete that enemy score + 1; } clear array using filter

draw bullet variables, w,h,x,y,ys, colour

new bullet(x,y,w,h,colour,speed) push into bullet array

enemy Bullet

class enemybullet contruct xpos,ypos,width, height, colour,xSpeed,

draw same as bullet

bullet move same as bullet

out of screen if y > canvas height

draw enemy bullet variables w,h,x,y, speed, bullet total // randomize the x, speed and bullet total

for loop i < total new enemyBullet(x,y,w,h,colour,speed) push into array

draw setup

text(x,y,colour,size,text) font = size font fill = colour text = text, x,y

colorRext(x,y,w,h,colour) fill = colour rect = x,y,w,h

draw img(x,y,src,w,h) image = src,x,y,w,h

draw all colorRect 0,0,canvaswidth,canvasheight,black text showing score text showing difficulty imgs showing lives

Main HTML page

//basic set up game canvas width of 500, height of 500 //link other pages