Two models, Claude Opus 5.5 and GPT-6.1 Sol, got the same plain behavior notes, no code and no assets, for three games: a brick breaker whose sound pans with the ball, a bullet-hell shooter with rings of bullets and a voxel giant game. One request each. Everything runs in your browser, and every game has an autopilot so you can watch it play itself.
A classic arcade idea: every bounce is placed left or right in the stereo field by where the ball hits.
Neon bricks, power-ups, WebAudio blips panned by the ball and an autopilot button. No edits.
Eight levels, combos, lasers and fireballs, a CRT toggle and autopilot. No edits.
Rings of bullets with rotating gaps, aimed fans and spirals, a boss with three phases.
A night village, paper-lantern spirits and a fox-mask boss with three phases. Autopilot dodges and bombs. No edits.
A framed playfield beside a story and score panel, graze scoring and spell-card banners. No edits.
A Voxel-style valley, a forty-metre giant with glowing weak spots and a grappling-hook ranger.