(WTC) [RPG] Ascerbic Rift

Not too hard.... .. ..

* Updated, as one of the Canyon Platform files wouldn't behave itself - loads ok in Editor but disappears in game-play . Replaced it with the simple ol' reliable Canyon Ramp by TGYoshi.

** Thanks to bullyz, I've repaired the section with a 'disappearing ramp' in the second building. It now works on my test computer - hope it works for everybody now .