Years after publishing this game I decided to make a small update. 

The new version 1.01 has a slight balance tweak. Some of the later puzzles were still too strict and overly precise so now most muzzles allow for some mistakes based on the number of overall puzzle pieces.

Someone recently pointed out to me that they were having trouble with a level that should count as completed and it seems like that was because some of the parts requiring too much precision and being too hard to see in some cases. I think, who the hell knows in the end. Different computers might have different quirks and this might have been an annoying bug, but I should have added this little feature to begin with, so here we are.