Nice game :)
I quite liked the jumping ability by severing your body. The last map however felt like a maze to me. Good for showing the goal from the start so that the player knows the general direction, but maybe some more variance in the walls would have helped a bit. You did mention you think it fits the theme so that's why you made the level like this but, at least for me, a bit more detail would have helped.
That being said, the platforming itself feels quite nice and that's the core so well done!