Hey guys, I heard that admins have been noclipping to finish Puzzles 11 and 12 or changing the map on Map 16.
Puzzles 11 and 12 are actually possible to do.
I have a video of me doing Puzzle 12. It's a bit long and I messed up a couple times but you don't need to watch the entire thing. The point is that I was able to finish the puzzle.
https://www.youtube.com/watch?v=DkEw-splNCIPuzzle 11 is a bit difficult to do with lag so I couldn't record myself doing it, but here's a screenshot of the server saying the puzzle was completed by me.

AFAIK, the only puzzle that can't be finished due to a bug is the rollermine puzzle in Map 14. If you think there are any other broken puzzles feel free to post in this thread and I'll confirm it.