i personally found it easy by tripping against objects when there was still at least a roof to walk on for 3/4th of the current screen , because the distance between 2 roofs is determined by your speed, after hitting something you can jump about 1/4th of a screen , so its just enough
youl go slower yes , but more controlled and youl have time to jump just high or low enough to enter those damn buildings where you go through its inside rather then room , they were the only thing that screwed me at high speed