You've nailed the theme, so well done on that. The platforming movement also feels great to handle and I like that intentionally dying is a strategy for certain rooms. The graphics are also really cute and tie the overall setting of the game pretty well.
I think that the instructions on the wall could be clarified better, sometimes it's not very clear what they're telling you. I'd choose a text color that contrasts more with the background and add more words or letters. The level with the rising platform also had its instructions hidden behind a secret entrance, which took me a while to find. I think that when you introduce new mechanics to the player, you should make them as obvious as possible so that the player doesn't get frustrated trying to figure out what to do.
Great work on the game, I enjoyed playing through it.