Great manipulation is needed here. Liked it, a lot. And had lots of troubles, figuring out how to even touch the exit. Really fun figuring out where things go at each step Very good puzzle, IMO (I'm still stuck at 121, will keep trying).
EDIT (next day): Got it, now. Very good one, imo. Wasn't easy to optimize, for me. Interesting structure! I have two completely different 2 offs, atm. Will keep looking.
EDIT (12 minutes later: AHA, got it. Very nice.). This series was really fun! Also nice ending to it