Only problem I've got is big lag with many people in the game and problems with reloading not working half of the time, often causing me to use a different weapon even if I still have ammo. Worst case is when all my weapons can't reload, I can only use chaingun and wait for reloading to work again.
193,696,919 and 431 max combo :) And by the way, if you manage to finish the 31-minute long soundtrack without touching any reds, you are a god: at x100, you have to watch for the reds; at x150, it gets harder to avoid them; at x200, it becomes a preoccupation; at x300, it becomes very hard not to get hit by any red; at x400, it's unreal. at x431 my circle's diameter was at least 40% of the width of the screen. I think I got hit 4 times in the whole 31 minutes.
Finally found a site that works for uploading mp3 files to play: fileden.com
Not trying to make any advertising or anything, and by the way, the site sucks, but at least it works. If you want to play the Age of Empires II Conquerors' Expansion gameplay soundtrack (31 minute long), enter this URL:
http://www.fileden.com/files/2010/1/3/2711575/Age%20of%20Empires%202.mp3