I dug the art! It complemented the straightforward puzzle mechanics, though I did find similar issues as others so I'll spare you the repetition of those points. I think overall you've got a super clean start for a polished puzzle game. Just some polish and you're ready to ship it! Thought it was great you had music/sound toggles, but would've loved some volume settings too!
I also somehow got two pieces stuck together at one point, but beyond that can't complain! Good work!