Opus 5.5 One-Shots a Full Prince of Persia Level with NPCs, Sound and Music
iannuttall · x · 2026-09-23
Developer @iannuttall tested Claude Opus 5.5: with a single prompt asking for a self-contained HTML file using vanilla JavaScript and Canvas 2D, the model one-shot a complete Prince of Persia level—graphics, NPCs with sword fights, floor pads and gates, jumping animations, flickering lamps, plus sound effects and music.
Controls are WASD for movement, spacebar to jump, X to pick up objects; a level takes a couple of minutes to finish. The full prompt is included, making this a vivid demo of frontier coding models delivering a complete playable game in one shot.
Related event: Opus 5.5 One-Shots a Playable Prince of Persia Level(3 posts)→
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