A $20-plan Sonnet 5.5 built PULSE//BREACH, a Rez-inspired music rail shooter

AIandDesign · x · 2026-09-29

Designer Marco van Hylckama Vlieg built PULSE//BREACH, a Rez-inspired music rail shooter, using Sonnet 5.5 on his $20 plan (no early access) with three.js. Music drives the shooting rhythm; you can drag in your own audio files and everything stays local.

Playable in the browser: click-drag enemies for combos, cursor keys to move. Another showcase of a complete, playable game from a single vibe-coding session.

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