(Did not know where to post...)

Dear George,
thank you for taking the time to create a prototype (and for another AUM!). It's just my opinion but I thought of a rather open level design like in Metroid Fusion/ Zero Mission so there is a gameplay element of exploration. I took the time to create a small prototype myself today, too bad I'm short on time at the moment, my exams start in 8 days.

Prototype Video

If you want to test it:

Prototype Download

Move - Arrow Keys
Jump - Space
Change period of time - shift
invert gravity - ctrl

Unfortunately the code is not well documented but it should be easy to understand!

BTW: I like the background of your prototype very much!