I made a two player game in four hours a few days ago about pushing each other off of a cliff. You each share the same keyboard, and mash your currently displayed key to Push the other player. Each player's key changes every 2 seconds, and can often be on the opposite side of the keyboard, so it quickly becomes a frantic, keyboard mashing game of finger-twister!
It also has pretentious art-game feels, which was not planned, but that's what the game turned into. Woo feels!
Download here (Windows .zip, 19.2mb)I hope you like it/hate it! Let me know
(Push was made with Multimedia Fusion 2)