I've picked the "Newbie Builder"-race and noticed this:
[ + ] A lot of tower upgrades
[ + ] Every tower has his own spell
[ + ] Good tower-description (but not very appealing)
[ / ] Not a lot of different towers per race
[ / ] Map Description isn't good
[ / ] Some towers don't attack automatically when upgraded, but they will attack if you force them to attack once.
[ - ] This map isn't balanced at all, you just need to build a lot of Windrunner Towers and you can't lose.
(only 2 of them could stop level 19, and you still have 8.5k gold left if you build only 2 of them)
[ - ] The Lich Tower's projectile is as fast as the creeps run, so he won't hit them if the creeps are behind the tower.
[ - ] The Phantom Assassin Tower (level 1)'s description is wrong, it has a 15% chance to do 5x damage, not a 20% chance to do 7.5x damage
[ - ] I really don't like the terrain (could be a matter of taste...)
[ - ] This may also be a matter of taste, but I think the icons don't fit this map (attack, move, ...)
[ - ] The ping in the middle is really annoying...
It seems the only good points are the upgrades and the spells, but you lack the gameplay and some minor mistakes.