Youbeat is by no means finished, but it's languished in a private repo for too long.
Youbeat is a jubeat simulator designed for the Novation Launchpad. The core gameplay is present and correct (albeit lacking hold notes), and there's a rough mapper which supports the launchpad too (although you can use it without).
The scoring is not accurate to Jubeat itself - that's probably first on my list of things that need to be fixed.
IIRC a post-game screen is currently not present (although the controller does support it) so that needs working on too.
The mapper has import/conversion support for a simulator filetype I found on the internet. No idea if it's common or not but it was useful at the time to generate a sample set of songs to test with.
No songs are included, for obvious reasons. When you launch the game it'll create a Songs folder in the folder it's in - drop the .TRK files from the mapper in that folder and it'll unpack them.
Edit: Updated YouBeat.zip so it includes a simple sample track and it's built in release mode so runs in full screen.