Cute graphics, nice game! I included it in my ProcJam compilation video series, if you’d like to take a look. :)

I like the way new zones appear! The enemies have sort of an unpredictable movement though.

Nice atmosphere!  I love the transitions, when new level areas appear, the character movement, it's all very smooth and professional feeling.  Seems like it could benefit from a bit more challenge, but otherwise a fine idea, well crafted.