Hello,
Very special and well finished game. I liked everything about it, from physics to music and sound. I liked the level design and those well thought details. For instance, placing an enemy under a green pillar, so that the player smashes it and understands that green buttons may be reversible and have versatile uses, not only as gates.
My only concern is that the perspective make some important parts or corridors to be hidden behind higer grounds. To solve it while keeping this perspective, maybe things can become transparent temporarily, or the camera could rotate slightly to follow MC in those instances.
Congratulations!
Cheers
PS: don't hesitate to try and finish our game :)