And having finished the B-sides, yeah, very cool, lots of fun, and I can't help but wonder if the new wall material is a hint of what's to come. Also you might want to know that in the current Steam version you have what I interpret as being a bad respawn point in 3-B right before the short zig-zag fall near the top of that portion - it's the same respawn point as in 3-A but the B-side has no floor there.