Shape Swarm is a top-down action arcade game where players survive increasingly dense waves of geometric enemies in fast, session-based matches. Players automatically attack while maneuvering through enemy patterns, collecting upgrades that modify weapon behavior, movement, and survivability. The game features short, score-driven runs, escalating difficulty, and a variety of enemy shapes with distinct movement and attack patterns. Progression is contained within individual sessions, emphasizing positioning, build choices, and moment-to-moment decision-making.