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HelloRun 2

HelloRun 2 lets you turn any track you own into a playable first-person rhythm level.

Code Video Cerebral Valley

Core trick

Analyzes an uploaded audio file in-browser for BPM, beats, and sections, then places gates on beats and turns on bars.

Tags

creative/music

Description

HelloRun 2 lets you turn any track you own into a playable first-person rhythm level. Drop an audio file in and the game analyzes it in-browser — BPM, beat grid, section structure, no upload — then derives the entire corridor from that analysis. Gates land on beats, turns on bars, and verse/chorus/bridge each paint the world and tune the difficulty. It's a prototype for the sequel to our 2013 Chrome Experiment HelloRun, rebuilt from scratch with Claude Code on Opus 4.7. Fully open source. Play now: https://hellorun2.pages.dev/

The linked repo returns 404, so it was deleted or made private.

Team