great game! but
The mages are FAR too over powered, if you make them do less damage per energy ball thing, or fire less of them, and give them less range (i had a mage shooting me from the edge of the Fog of War which i couldnt kill, also it was firing 5 magic things and taking out everything!) then a better score would be in order.
also i reckon if when you click on an enemy it should place a priority target on it. EG if theres a mage reeking havok whilst your towers are shooting other creatures then you should be able to click on the mage and the towers should shoot that first.
another idea is maybe you could buy upgrades (eg faster fireing, more dmg, dual shot etc) from the relative buildings (eg upgrade for a guard tower bought at dewllings, upgrades for cannon towers at forge etc) and maybe the town centre could revive heros after a few rounds after theyy die (they also dont have enough health... if you arnt gonna try the revive thing then make them have more health)
this seems to cover most of it.
its hs potential to be a really good game, but its just these fewthings holding it back :O