Shooter
The player commands a spaceship piloted by a cow. When all in-game lives are expended, a cutscene depicts a cow in a spaceship, flying across the screen, towing a banner that says, "In space, no one can hear you moo." The general objective of Crystal Crazy is to collect all the crystals on a given stage, and often to complete other quests, then escape through an opening at the bottom of the screen. At higher levels, the opening will change size at a fixed rate. Quests include erasing or revealing paintings by navigating the spaceship over the canvas; knocking pool balls into the exit opening; breaking wine glasses and other fragile objects against the edge of the screen; or simply defeating all the enemies on a given level. Bonuses, which add to the player's numeric score, are often scattered across the levels and can be collected.