Thanks!
I too want to make more levels; but if you read in the description of the game I really don't know how to make puzzle levels unfortunately... As much as I want to I think I can't expand this idea any further...
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.