It's a game based on fear and the heartbeat is there to simulate the playable character's heart. The game is a classic platformer designed for intense gamers. Watch out for killer rocks!
Stay Inside The Box: The whole game takes place in just one screen, no scrolling or changing screens in any way is allowed.
No cheating (please): The game system relies on willing player participation to enforce the rules of the game world (e.g., hold your breath, close your eyes, etc.).
X Marks the Spot: The game involves something location-based, such as a geocache, or requires the player to go to one or more specific geographic locations.
Bigger Picture: The game touches on a political, environmental or social issue.