Really enjoyed this game! The intro was a little hard to follow, and none of the story was relevant for the gameplay. I loved the sliding puzzle mechanic, reminded me of old Pokemon/Mario ice puzzles. Music is great, graphics are very cute. 

I think if you want to leave the intro text how it is, maybe have the enemy sprites be the "annoying ghosts"? I played until level 11 and didn't see any enemies that would be related, but they were all nicely drawn. Especially liked the flying axes, the spinning spike pillars, and the spikes that popped out of the holes.

Really good job! I'd enjoy playing it on something like the Switch as a cozy puzzle game :)