The game is very unstable. The pathfinding is very buggy.. One dude gets stuck on the 37th wave, hitting the calendar does the same thing he was doing in his own time... 37 waves, wasted :/
I was just getting into it and everything :p CS5 doesn't seem to support the same functionality as whatever version was used when the tutorial was made when it comes to the programming the MovieClip imo. Plus ActionScript 3.0 is now available to use.