I feel this game had great potential, with the unique upgrading style, but like everyone else is saying; The air units are too strong, and the anti-air towers are too weak. You have too choices. Build ground attacking towers so your base doesn't die, or build anti-air towers so your towers don't die. Four level two anti-air towers on level 5 won't kill a single air unit. Not a single one. Isn't that a little ridiculous?
It seems like a fairly decent browser RTS, however there's two things that are bother the HELL out of me. 1) I'm a Starcraft player, so my APM is up there. But I can't micromanage my units very easily when I try to click on a single one, and it doesn't deselect the entire group and select that one. I end up moving my entire selected army around and they just get potshotted. 2) You have to increase acquisition range. I find it a complete bitch to have the orcs attack my units and not my base even though my unit is pretty damn close to it. I find myself making it a chore to have them not attack my base to get the perma upgrades, as opposed to just playing the game.
I think a great addition to this game would be the ability to advertise. I once played an awesome sports marketing game where you owned a football team and you could do market research and advertise on certain radio or tv stations. If this could be implemented it would be amazing. Also... ADVERTISING>>>>>BUYING TOKENS. I had to add that.
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 "Canyon Defense 2"){kind=icon}
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