I got to 172 as my high score! I never quite got to the replica mechanic when playing because I was having fun with just gambling for coins and giving it to the dragon as quickly as possible, but on my next play I think I'll try it out too.
One thing I noticed was that the two doors next together in that lower level are placed very close to each other, making it a little harder at times to enter the right door I wanted to go to especially when I was rushing. A small gap between the doors might make navigation a little easier. This was fun!