Game: Heart 4K
Stay Inside The Box: The whole game takes place in just one screen, no scrolling or changing screens in any way is allowed.
Atari Age: The game must be, at a maximum, 4Kb in size.
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.
May the (Web) Force Be with You: The game runs in a browser with no plugin.