The menus, music, sfx and overall gameplay are all really good. The puzzles are also quite well made.
I'm not a fan of the diagonal perspective for platformers, especially when the controls aren't perfect. The jump had too much gravity in my opinion and because of the perspective and/or shape of the player, you can't see if you're all the way to the edge of a platform, making you underestimate the distance of a jump.
Overall, I think it was a great game. Nice job!
Note: The game seems to take a long time to load on firefox. On chrome, its fine.