Lmao have you played kaizo mario games before? (or mario maker kaizo levels for that matter) Level -2 super reminds me of those.
I liked the main mechanic of how you could go back and forth between levels, it was a cool take on the theme. I also appreciate the large grab radius of the robot because I thought I softlocked myself by throwing the box onto the first set of spikes at first lmao. The graphics of this game are also really good, as well as the sounds!
Unfortunately I feel like this game falls apart when you get to Level -2. You had this cool idea going where dying sends you back, portals send you forward, and the objects in the world are consistent. But then when you get to this level it completely throws all of the rules you established out the window and it becomes a normal platforming game where dying just sends you to the beginning of the level, and you get your box back when you die too, so it essentially feels like a different game. I also felt like the massive amount of text explaining what to do felt clumsy. Don't get me wrong, I enjoyed the platforming in this section but it felt really inconsistent with the rest of the game.
But overall this was a really fun game! I appreciate the physics of the character (and the massive amount of coyote time) and how you weren't afraid to add a bit of difficulty platforming!