Sorry I don't have a Mac to test things but have you tried the arrow keys?
I have and it works sometimes but other times it randomly pauses and I am once again unable to move. I've found that spam clicking the return key works occasionally, but only occasionally.
Hmm strange, are you playing on browser? Have you tried the downloadable Mac version? Sorry I might not be able to fix the issues without a Mac.
I'll try to play it on the downloadable version!
