Wow, this game has so many instances of really slick player-friendly design. For example, I love that when you put a box in a place where it's stuck (a corner), the box detonates! Great way to avoid player restarts there.
I also love how mechanics are teased at the bottom of the screen in some levels to give you a feel for them at the start. The first screen of the level with the buzzsaws teases the buzzsaws in a safe way at the bottom of the screen so the player knows what's to come. Similarly, the red clone mechanic just starts off showing you that it moves with you and nothing else to hurt you at the start of the chapter.
I think the red clone mechanic was my favorite, as it forces you to use the teleport mechanic as more than just a gap closer.
The final boss was also awesome! The big wall attack was the perfect type of attack for this kind of game, it always felt good to teleport past it.
The soundtrack was also really good! It fit the mood perfectly and the final boss track was a banger. Great job!