i know that you already have a bunch of ideas but here is another one

what if the gravity was continually changeing the entire time and you as the player have to be in the right spot at the right time so you do not die. perhaps this could be used for just a level or two where the gravatron device is malfunctioning and will not stop changing gravity.

i also hope you keep the discussions and progress on the forums because i do hope to follow along. good luck!