I hate games where theres a bit that you cant jump on... you should really test this because when you get to the rooftops, the ledge is too high to jump. Even the enemies cant jump on it :l
level 20 u hook 1 of the faces near the top of the topwer and drag it back, release the wrinch thing and quickly go over the tower while it is wobbling
To beat the lvl with the password "Breakin" you needa shoot the glass of the door next to the gaurd, then shoot the camera, then shoot the street light out.