1945 simplified

[Marcus]

Regarding collision, "just" check if two images overlap. It's easier to understand if you draw some on a paper

Code:

for x=0 to 2
        dead = bulletX + width(2) > enemyX[x] and bulletX < enemyX[x] + width(3) and
            bulletY + height(2) > enemyY[x] and bulletY < enemyY[x] + height(3)
        if enemyY[x]>480 or dead then
            enemyX[x]=rnd(640)
            enemyY[x]=-rnd(50)
         else
            enemyY[x]=enemyY[x]+speed
         endif
      next