Really enjoyed the idea you're playing with here. I didn't realize i could use the arrow keys and did have a hard time coming WASD with Q and E in the desired way. Would like to see more levels playing around with this idea, a lot of options are there i think
Viewing post in Literally Short on Time jam comments
I think you do need one or two additions in order to create puzzles in levels. Some ideas:
You have some ground you can only break through if you're heavy enough, some surfaces that only hurt you if you are too heavy, you can pick up/rescue time in some part in the room, some air streams that only lift you if you are light enough, etc.