Very good game! Great take on the theme. The platforming usually felt good aside from not being able to double jump at certain times for some reason. One thing to consider (is probably not intended) is you are able to get the key without getting the blue orb first, making it impossible to get out and you have to restart the game (unless there was some insane way to get out that I wasn't aware of). This soft lock could be very frustrating for some players. The boss fight hitboxes also felt a unfair, but the fight is still very doable. The boss fight itself is very unique, and is an awesome addition that plays into the strengths of the game's mechanics. I did find myself often confused not realizing I could do something, but perhaps this is my fault and not the games, lol. The music felt like it fit, and the art style was pretty good. Overall, great game!