I like the game, but I couldn't finish it. I got frustrated that it's so easy to be killed without the slightest warning (HP reserve, maybe). At least until the point I tried I didn't encounter any checkpoints(I saw a flag that thought it was one, but nope, or it didn't work), which I think could be great specially at the beginning. When you're trying to get used to the game, you don't want to repeat the very beginning again and again.
Apart from this, I think it's a great idea and a fun game. Though nor the game or the music felt relaxing for me, I find both very interesting and pretty worked.