The artwork and atmosphere were very nice!
I won't echo the feedback that was already given regarding art, layers, and controls, but it will be interesting to see how the game feels with these improvements.
I didn't actually know what I was supposed to do since there is no tutorial yet, I was able to move and jump, but no other keys that I pressed seemed to do anything. It might be worthwhile to put a description of the objectives and controls on the store page in the meantime. (My game also lacks a tutorial, but my store page helps fill in the gaps, there's nothing wrong with a work-in-progress :-) )
Overall, great atmosphere, art, and progress.