I think I went into the final door earlier than intended, and it froze the game. Then I tried when I felt I had progressed much further...and it froze again. So I'm going to play around once more and see if moving things in the game can maybe help move things in the room. Hopefully I can make it further, because it is a little frustrating to restart.
EDIT WITH SPOILERS
Yup, moving stuff around let me adjust the room! Very cool. Got to read more of the diary (sad), got and placed the mirror shard. Couldn't figure out the spiral room or what to do with Froggy. Creative game!