Alien Dodgeball was first originally released as a Flash browser-based PC game too many years ago to count! Re-released in 2026 as a web app.
I was playing around with the physics of a bouncing ball constrained by the edges of the screen with gravity toward the bottom of the screen. The user would use their mouse button to "grab" a ball and then fling it while releasing the mouse button. That would send the ball bouncing around the screen. I then added a target and the next thing you know, Alien Dodgeball was born. Reversing the effects of gravity for the alien balls solved the problem of aliens and players both at the bottom of the screen to get balls. The result is interesting gameplay!