I liked the different levels. They were clever and interesting. And the music was cute. If it had turned off key or something as it played, to signify that “something isn’t right here”, that would have been cool.
Other than the controls being a little floaty, there does not seem to be an attempt to make a “horror” game. Adding some of those elements would have been nice. Maybe giving the player a “jump scare” by suddenly introducing a monster like character to chase them or using art that had a more ominous quality. Something like that would have been nice.