The platforming felt really good for a jam game: speed, control, gravity, wall jumps, double jump (and I think there's also slight coyote time) - it all makes for a very pleasant experience. The theme is used loosely, but I don't think there's anything wrong with that (not every game need to have literal building and/or scaling).
Visuals, music and audio are great and alongside the story make a very cohesive package. Nicely done :)