Battle Balls!

In this game, you are an either red, or blue ball (depending on weather you use the arrow keys, or WASD keys) trying to knock the other into the lava. There is no end to the amount of times you respawn, but when you do, WATCH OUT! You don't stop moving when you respawn, so if you keep holding the down the button, you'll probably fly off the edge.  Also, when you first open the game for the first time, check the options menu.  ;)