The design of this level is superb! The way there's just enough space for things to fit is extremely satisfying. Unfortunately for me, optimizing it is proving quite a difficult task.
This level is really tough for how short it is. Every block interaction counts and there are a lot of particularly tricky setup points that can be missed throughout. Kinda blown away by how intricate a path came out of this setup tbh.
Tricky path... Hoping 139 is optimal.
EDIT: Finally got the 137. I don't think I've encountered this exact pipelining trick before, very hard to see the right way to do it.