Click on game to focus it if necessary. Use up-down arrow keys to choose one player or two player version.
By the folks that brought you Sack Smash 2003
Use the shift key to move through the intro (don't forget your hat) and to pause the game (pausing also displays instructions).
One Player controls:
u - jump, h - left, j - reverse, k - right,
a - cannon up, s - missile, d - cannon down, spacebar - fire cannon
Two Player controls:
Arrow left - left, Arrow right - right,
Numpad 0 - fire, Numpad 4 - aim left, Numpad 6 - aim right