It was a little frustrating at first. I think some indication would be nice about what's happening. Maybe some texts or sounds to show that other room is available and player did the right thing - I could not realize what to do with the red wheel and which direction I need to rotate it.
Otherwise game looks nice and amount of time for each loop is just right - not too short, not too long. It feels good for this size of a map and gives time for exploration but at the same time you feel the pressure of doing things fast.