I would be happy to do a few, since it seems like a fun thing to do. However, without pay, I can't do all of the levels, I have my own projects to work on. I can give you advice and point you to some sources to learn how to do some of it on your own if you'd like. But I can certainly do some help and some design work, as it seems pretty cool. I have a few notes of feedback after playing that demo as well... ;P
I also use Gamemaker:Studio.