weak drift
So on Act 3 in the museum, when I was supposed to just enter the code on the safe, I ended up exploring WAY too much than I should have. I got on the roof and entered the attic early by breaking the round window with the crowbar and squeezing inside. I escaped the cage and did everything in the attic backwards, and also apparently too soon. I didn't know I wasn't supposed to be in the attic.
I ended up figuring out the safe code and beating the Mayor's mansion. But now that I'm back in the museum, I can't trigger the cutscene to go to the next act. Every single puzzle in the museum has been solved already - all 3 heads, all 3 gears, the attic door, all keys and locks - and there's nothing left to progress me because I solved all the puzzles already.