As soon as I read "Mastermind" kind of mini game I wanted to play this!
Played Mastermind a lot when I was a kid and still have the game. Sadly my family does not like the game all that much. I wonder why...
Anyway great use of the Synty Pack! Great overall vibe, combat is a bit of a lack luster but it is fine for a jam game.
I read that you are not all that proud of this entry but despite it's flaws I enjoyed it very much!
Are you going to update it post jam? You could add some more Mastermind lock picking on some of the treasure caches, would love that.
Certainly exceeds my expectations for a 9 day jam game.