awful, 1 2 and 3 are easy as hell. But then if you didnt max out your bazookas lvl 4 is impossible. Level 5 and six are easy as hell if u max a couple rockets. But lvl 7, u need maxed bazookas, production speed, and lots of micro management. Lvl 8 is impossible. You can only make 10 bazookas at first and from the start hordes of aircrafts and tanks come. I can't beat it.
wow, at first the truck level actually seemed impossible, but then using tanks i killed the towers and my truck made it safely to the hostage, as I blew a sigh of relief WTF 4 helicopters come and rape my truck.