That's a really pretty little experience. The way the character affects the environment was a really nice touch, it looks and feels great, good job!
I do feel like something is missing, though. I understand that the focus was the environment and the vibe, and that you may not even want to add any real gmaeplay, but I feel like the game could have benefitted from a narrative. It wouldn't even have to be done through text, it could be entirely environmental, look at how Journey did it, it told a story without a single word of dialogue. I assume it was a major inspiration for you--and if it wasn't, then wow, you really should check it out!
Also, the music was just so nice and fitting. Good job on finishing it all in time, that already is a feat!