Not sure if this bug has been mentioned, but someimtes when I restart a map, it is "blacked out" . You can still play and place towers, but the whole map is just black. Other than that, great game!
I really like this game, its well made. The only change I would make is put the armor on the melee guys and not the archers. I understand the archers have no defence, but they are rarely in harms way ( at least in the demo). The melee guys are the ones taking any kind of damage I've seen.
We gave the berserkers a high regen rate to make up for this. Put too much armor on them and the healer is less useful. Plus, it really fit the berserker personality. Admittedly, it starts to make more sense in the full version where heavy armor is added to some of the other units, but even at this point it creates some interesting scenarios where you need to keep the berserkers healed up so they can do their crazy damage.
 "Busted Brakes"){kind=icon}
 "Wild Heroes"){kind=icon}
 "Defender's Quest (lengthy!) Demo"){kind=icon}
 "Crunchball 3000"){kind=icon}
 "Find the Gold Coins"){kind=icon}
=)))