I'm glad you enjoyed it even with that problem!
The part you got stuck is trying to teach the action of turning to stone while floating. If you do it while high up in the air, you'll come crashing down, which is the only way to press floor switches (turning to stone while sitting in the floor doesn't give you the required force to press then).
I guess I had a hard time to convey this idea just through glyphs. I planned on showing small images to make it clearer you have to be moving to work and make it more related to the action of pressing the switch, but I did the tutorial last with 30 mins left to submit, so I didn't had the chance to do it.
Thanks for the feedback anyways!