I also found that I saw occasional flashes even though I was using KS+ with single-pass rendering. What's up with that (egomassive)?I've come to believe that the underlying engine has some sort of multi-threading behavior which allows it to give inconsistent results. However it works, there is no documentation to clue in programmers, so we have to do ugly things to make it behave itself. The Custom Objects are an add-on which is also a black box to programmers. Their inner-workings are unknowable and unchangeable. In short, I did my best.
I think I can modify the collision mask on the spine tiles using invisible pixels to improve the climbing without resorting to invisible objects. I'll try this in version 2.
OK, but keep in mind that the spine tiles already have an invisible collision mask. There's not a lot you can do to it other than extending parts of it out by a few pixels so that the entire thing is one straight line, but given how curvy the spine tiles are, Juni will still often look like she's climbing on air.