Nice power washing, I am a big sucker for those types of games. I couldn't work out if there was an end time it looked like it went down, and then started going up. the points wouldn't always go up when you cleared a tag. I got to the one on the roof, nice hiding it up there, was tricky to navigate the stairs as I clipped through the railing a few too many times.
Also, I am interested in finding out more about how you did the power washing effect, it felt very smooth. I have been interested in trying out doing and effect like that but haven't as of yet.