If you die, there's too many bldgs. being obliterated...intercept as many of those bombs as possible that come down at u, u have to track back and forth all the time, kill all the squids so they dont infect ur bldgs. and when the squid comes on lvl 7 or 8, u have to go back and forth between tanks, using the powerups..thats wut theyre for....the mothership...just try killing only 1-2 ufos, then focus on her with everything u got.
After reading these comments I want to put my 2 cents in....this was the least pressured of all the challenges so far. Yeah, it might have a few bugs here & there, but nothing serious. If ppl would go to the forums or be directed there, an understanding of the strategies can be found. Indie did a fine job here.