The source code contains an extra level with ECG style hilly terrain.
Game: Beat Cop
Platformer. Use W to jump and S to slide. Pick up Defibrillators and blood packs to go faster
True Colors: The game uses only the basic 16 colors: black, gray, silver, white, maroon, red, olive, yellow, green, lime, teal, aqua, navy, blue, purple and fuchsia. See color chart
Backwards: One or more aspects of the game works the opposite as would normally be expected: maybe the controller is reversed (left is right, right is left), maybe you win lives every time you die, maybe it scrolls to the left and your character moonwalks.
Inclusive: The game is specifically designed to include people with a given disability.