The game seems to have some sync issues, it feels like it's almost there, but can be perfected. The music is really nice though! Also, I find it interesting to concentrate on a single pattern: once learned, it's great to feel in the "flow" of the music.
However I had two main problems: the first is the key position. "Up" being at the bottom… That's quite confusing!^^ The second one is the instant game over. I feel it to be too punitive, having to start over again and again at each mistake is frustrating.
But rhythm games are hard to make!^^ And this is a pretty decent result for a game jam. Congrats!