Thanks to the folks at Poki for porting this to HTML5! You can also play it on Poki. To play the original Flash version, your best bet these days is BlueMaxima's Flashpoint.
This game is my take on 'Fight of the Sumo Hoppers', and it was originally designed to be controlled with two trampolines.
Controls are AWD for player 1, LEFTUPRIGHT for player 2. First to 11 is the winner. --Bennett