Intermittent screen refresh and controlling the game

Ive got this bug twice now: sometimes the game suddenly freezes, screen gets black and i cant see anything. then after a minute or so i start to see the screen every 20 secs for maybe 10 frames in high speed mode. all i can do is build stuff and send creeps, i cant upgrade or change tactic.... also i cant see myself losing any lives. when the screen was black at the first time, then i was able to upgrade i think.

happened once again! this time i was able to build everything and change strategy for towers, and nearly won the game
http://www.creeptd.com/game?key=aeeh0eo ... ikvhclibuf didnt upgrade 2 towers for some reason... maybe i missed them because screen was black or something

you were asynqchron