In timed and coins, it is a single player game, using arrow keys, where you have to avoid the red guy without losing your five lives. After you press start, choose your mode. In timed mode, avoid the red guy for as long as possible. In coins mode, collect as many coins as possible. In multiplayer mode, WASD is tagger first, and has to try to catch the blue guy, or the person controlling the arrow keys. When someone is tagged, they remain using the same controls, but just switch color.
@Stratford James for inspiration for coins and hearts.