This is the stupidest crap I've ever played. The enemies are programmed to move away from your curser and they do it so dang fast while my guy takes 5 seconds to 'bite'. Got to lvl 5 and just gave up on this stupid BoD.
Really great game. I found a strategy that works extremely well in just about every situation. Buy a couple of Command Shells (30 memory) and wait for the upgrades to be Blue and Red, then add Splash and Slow to them. Group two of these towers close together with a Infector with Splash, Slow, and Damage. If you cluster these together, enemies will not stand a chance.
Found a really huge bug. If you buy things like the boat, scuba gear, hedge trimmers, and climbing rope, and then die on the next exploration, all the maps will be unlocked, but you will still have your money and the items will not be purchased.