There are three types of enemy in the game, the first and most numerous being the "apples". An apple will die if it falls at a single level. As the player advances, green and blue enemies will start to appear, which must be dropped through at least two or three levels, respectively. This is accomplished by digging a series of holes, one directly below another, and trapping the enemy in the uppermost hole. The player earns extra points if they drop one monster on top of another (killing them both).