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AI · December 4, 2025

AM

AI music and auto-charting and custom rhythm minigame sandbox

I've been tinkering with a browser-based rhythm game creation tool. The pitch is simple: AI makes the music, Essentia.js figures out the beats, and you write the game logic in JS. Demo: https://rhythm-seodang-web.vercel.app/ The problem I wanted to solve: most rhythm game workflows are heavy. Proprietary editors, manual charting, fixed gameplay patterns, desktop-only. I wanted something where you could just... open a browser tab and start messing around. How it works: - Music comes from AI services (Suno/Udio). No user uploads, no copyright headaches. - Essentia.js (WASM…

AI music and auto-charting and custom rhythm minigame sandbox launched on December 4, 2025 with 7 votes, #1,248 of 11,628 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.

What it does

In the maker’s words, at launch

I've been tinkering with a browser-based rhythm game creation tool. The pitch is simple: AI makes the music, Essentia.js figures out the beats, and you write the game logic in JS. Demo: https://rhythm-seodang-web.vercel.app/ The problem I wanted to solve: most rhythm game workflows are heavy.…

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