Whoa. Once I figured out the controls I felt compelled to keep going. What an awesome puzzle game!
I really like the style you went with -- simple, readable, and creepy but cute. My main gripe is that there's so much on the screen in certain levels that it can get a bit hard to read regardless of the style's simplicity. And the grappling hook skeletons I had to figure out mechanically, they were a tiny bit hard to tell apart. Some variation in enemy silhouette could help greatly with both of those problems.
Greatly enjoyed the atmosphere, thought the story was very fun and well-written, and I loved the dark twist at the end. One of the most brilliant games in this jam for sure, well done!