Made it to the tippy top. Very fun to move around when you get the hang of it. Only thing I don't understand is when you can do the F key boost, it seemed random. Also I never learned to slide, but never needed it to get up high. did I miss something?
Very nice so far!
EDIT: I see it now, the orb is the indicator and you can only do it in the air. I had a feeling that was it, but I was trying to hit F while on a wall, so I dismissed it.