Six AI coding agents built the same browser game. Only two handled collision, restart, and mobile input correctly.

A multi-entity browser game case for movement, enemy logic, projectile collisions, and visible combat feedback.

A vertical shooter case for enemy waves, projectile patterns, hit detection, and readable survival feedback.

A scored space-maintenance visual case comparing four runs on realism, microgravity logic, and prompt fidelity.

Four model runs tackled the same clown-juggling prompt, with the spread driven by silhouette quality, juggling rhythm, and how convincingly the three-ball waterfall loop holds together.

Four AI models animated the same stage magician prompt. The strongest run was not the busiest one, but the one with the clearest hand-to-card causality.

A compact physics and restart-state test designed for short video comparisons.

A drawing tool case for pointer events, coordinates, undo, and export behavior.

A 3D scene case for camera setup, controls, lighting, and non-blank canvas checks.