This is my first program for the GP2X. It features balls bouncing around the screen. It will run noninteractively, but controls are available if you want them. Start = Quit, Select = Slow Mo, Joystick = Gravity. The balls bounce off each other and the walls elastically, with integrated wall collisions and discrete-time ball collisions. The background plasma was the only effect I could get to work without hurting the framerate too much.
-- Sparr
sparr0@gmail.com