Oh my it has been quite a while since i played a good thought out defense / tower game.
Liked the variation of spells and upgrades and liked how i didn't have to left click repeatedly over and over or else i would have dropped this game in the first fifteen minutes. Found the Demon Tree to be extremely useful, bosses were unique, sound & art are good. I would definitely love to see a sequel.
Some ideas for a sequel, maybe have the tower use a attack, have the knight come out of the tower on a horse lancing targets in one direction for massive damage, have the sentry knight use different weapons that deal more damage respectively / bow n arrow / cross bow / bolt of lightning / catapult etccccc
Great game !