It is a really beautiful game! Your assets are gorgeous, and the music fits perfectly (it is maybe lacking a bit of sound effects? but that's a detail).
Your game is working pretty fine, I didn't see any bugs (maybe you could have add the possibility to play with the arrow keys for not QWERTY keyboard users? But once again, that's a detail).
The major drawback is the lack of content (it is deceiving because, otherwise, your game is very promising)!
Overall, that was a cool experience!