wtf man
EDIT: After having solved R4, it became much easier to understand the kind of deductions you need to be able to reach the exit, but it is still not easy or trivial. Optimization, while not brutally evil, is much more involved than the optimization of R4.
Haven't attempted yet but I can already see the general idea and it looks very very cute.
EDIT: Solved, cute indeed. One shot if you see the pattern, though there is a somewhat sneaky 2 off if you're not paying attention.
This level is a masterclass test of pipelining techniques. Not only do you have to thoroughly understand displacement pipelining, you also have to understand [REDACTED].
The design of this level is excellent. Given the particular theme and size constraint, it's not easy to make a level such that it's not even immediately clear which direction you should go.
Insights