i'd have to start this off by saying...
Good job...but i don't think its very....umm.....playable?!
i would try to redo it without most buildings being ontop of those spinx parts, sorry i don't know the name of it. that might help out with the lagg. feels like ur in a real close-quarters city though!
as it is my p3 can't keep up at all...sniff-sniff. wait...i forgot about my new laptop!
muhahahahaa...d'oh