I really like the last 2 levels. They do give the "aha" moments.
Only 2 complaints: the rotating doors must be pushed from a far i.e. you step through and can't immediatly turn around. You need to step away. I t would be okay to not show the character moving when stuck on them or walls . 
And you can't fall from these platforms, which I'm very used to.
Otherwise it's great.