[quote name='FriskyTanuki']Oh, I just ran into one while trying to do the E course of puzzles on E7 after about 2:07 in, though I just spent 5 minutes on the previous puzzle when I couldn't figure out the solution right away. I'm guessing it's a total time limit and not a limit per puzzle then?[/QUOTE]
Right. I have no idea why they would put you on a time limit, because you aren't even rewarded for getting all the way to the end. So it adds frustration with no benefit.