Damn.. The concept of this game is really astunishing. My compliments.
Please go further in the development in this type of game. A TD with heroes, exp and faction reputation is seriously a great concept!!!
Some feedback:
-Might want to add a bit more side quest lines and a bit less random Generated Quests.
-Might want different factions to be eachothers enemy's or ally's making you being disliked by the one when you get befriend by the other.
-I finished the game with 1 single hero and some Elemantal change items. Might want to nerf the benefits you get from a hero or make some LVL's impossible to finish with just 1 element.
-Some more lvl's without flying units to improve the benefit of having melee units.
Would love to play Protector 5, ive played all protectors but this one is really worth commenting on. 5/5 Keep up the good work!!