Colosseum 2120 is a 2 player arena shooter, where both players can be controlled using 1 keyboard.
Shoot the other person to win. Obviously.
Bullets will bounce off walls and keep doing so until they are destroyed. If two bullets collide, they will both be destroyed.
Both players also have a laser attack, which penetrates walls, but takes 3 seconds to charge, during which time the player can neither move nor shoot.
There's also a cool bug which I decided to keep in, where if you shoot at a wall at point black range it will zoom you across the room. Use this for faster travel!
arrow keys to move,
enter to shoot
backspace to fire laser
WASD to move
space to shoot
z to fire laser