This is a music game + engine I'm working on.
You're probably going to want node@4.x and npm@3.x.
Then:
npm install
npm run-script dev
Navigate to localhost:8080/songs-list and you should be in business. I recommend loading the demo song and chart in the demo/ folder.
npm run-script karma
Will run tests in Chrome.
sdf<space>jkl - set the 7 columns
p - toggle playback
up/down keys - move up and down
left/right keys - select movement resolution
pgup/pgdown - move up and down by measure
plus/minus - increase/decrease space between beats (think speed multipliers)