As promised, I made a game in 0 hours in the wee hours of the morning! Here it is: The Kid And The Kid: Teal Alert. It’s a co-op test of asymmetrical controls. One player moves and fires with the arrow keys and the other moves and fires with the mouse. Thanks to Shamayel for helping do balance passes in the last few minutes of development, and also for coming up with the name.
Red player: click to move; don’t click to shoot
Blue player: arrow keys to move and shoot.