Welcome back, Frodo! :)
I had some trouble with the mere exit touch, here.
I will try to optimize, now.
EDIT (the next day): Got it! Manti's 216 is really a nice one!
Never found a 121, I jumped straight to 119. Really interesting solution though - it feels like ****************************************************************************************************************************************** Tough to find, but neat.
I enjoyed looking for 551 (had a two off, before that, as well, and was stuck at 585, for quite a while).
Not sure if it's optimal. If proven not to be, I'll be back. :D
EDIT (a year later, 10 April, 2025): ********************************************** This level has so many options, it was hard for me to tackle.
Insights