Very cool game! Very good ideas used in many really cool, and progressive ways. Feels a bit unresponsive, and that may likely be due to the pico-8 engines limitations, but I think you could still added some stuff like coati-time. The collision is also a bit wonky on some blocks, because I can slightly go through some of them, and I don't know if that's a problem with the engine, or poor collision detection detection. Regardless, very good game for a jam game!
Edit: Incredible music, and SFX btw.