I had to check the screenshots to understand, but the idea is not bad at all!
However I think that some little things could improve the overall vibe of the game:
- A skybox with a nice sunset and some rays of light and then you nail the automn vibe! Your visuals are nice but it lacked a bit of something =p
- Maybe put a bit of a wide reverb on this piano to make it sound less dry haha. Not to hard to do but improves the feeling a lot ;)