I think this might have malfunctioned for me. I could only open three of the doors. I thought they might be unlocked later, but I couldn't figure out how. This could be my mistake entirely.
I think this game would benefit from a longer music loop. Also, some texture on the reddish floor (the one in the third screenshot) because I was moving the little guy in the middle of it and I thought they were walking in place.
All in all, cute graphics, interesting premise, and I'll be trying again in a few days to see if I missed something obvious. I enjoyed the game despite my nitpicks.