However bad having to require kreds are, the lag is the most horrible feature about this game becuase kreds or no kreds, computers tend to lag when over 5 sungods and a 1/2 filled screen are present.
hint: bait and lure tactic. have a good range unit on one side of the river, and a fast unit on the other. use the fast one to lure melee enemies to it and switch to range unit, press shift, then snipe at your pleasure
Fun glitch: hold shift while building a tower then click rapidly on one spot: you can build lots of towers on one spot, and building more towers can be more cost effective when you consider damage