Alright. Yeah that is one of the ways I tried to solve it.
I was playing the v1.5/English/Windows version.
When playing it a second time using the same route, it still seems like I get in the same state after completing the puzzle.
The state the game gets in is: All that I can do is continue modifying the puzzle, click the X to exit the puzzle screen, continue collecting coins, and/or hire workers.