Rumble Box is an indie beat-em-up where all of the characters are made of basic geometric objects, like cubes and spheres. When defeated, the enemies break apart and pile up in the arena. The goal is to escape the arena by piling up enough enemies to fill the room with parts.
The enemies range from harmless Fodder to powerful Thugs, agile Ninjas, and the monkey-like Wildmen. Some enemies also have bombs in place of their heads, which explode shortly after the enemy is defeated. Luckily the player has a wide variety of martial arts moves available to him, from the simple punch to the group-clearing spin throw.
Performing well in any level will unlock one of nine bonus stages with alternate gameplay goals, such as avoiding a steady rain of bombs or surviving an onslaught of enemies in complete darkness.