Oh, and also. The buildings length to jump depends on how fast your going. If your going slow. the gap will be short. If your going fast, they will be long.
Just made a awesome descovery to help you.
When you hear a loud tap (Like a judges hammer) One of those Mine things will shoot down on the next building.
 "GrindQuest Beta"){kind=icon}
 "Canabalt"){kind=icon}
 "Vox Populi, Vox Dei(a werewolf thriller)"){kind=icon}