The player controls the Kye, a green sphere, using either the mouse or the keyboard. The only action in the game is movement – Kye interacts with the game by pushing objects, pulling them, or consuming/collecting them (by stepping onto them). Each level is a single screen, of 30×20 squares, each of which can contain a single object. The objective of the game is to collect all of the diamonds in each level, after which the player proceeds to the next level. There is a password system enabling a player to return later to a level he/she has reached previously.