Biomechanical Toy uses a side-view perspective. The objective is to move through successive stages, defeat enemies, avoid hazards, and reach the end of each area. Levels are built around platforms, gaps, vertical movement, mechanical obstacles, and enemy encounters.

The player runs, jumps, attacks, and collects useful items while progressing through the game. The arcade structure favors learning enemy patterns and stage layouts through repeated attempts. Exact control assignments can vary by arcade cabinet, so the standard joystick and button mapping is not specified here.

Study enemy movement before advancing, especially in narrow platforming sections. Move carefully around hazards rather than rushing into unfamiliar screens.

Preserve lives by using safe positions to attack and by learning the layout of each stage. Repeated play is important because later sections demand accurate jumps and faster reactions.