One more thing, maybe a slightly larger square on the map for your hero and have the camera not snap follow him... or be able to toggle the camera style would be amazing.
4/5, the only reason I don't say 5/5 is because the individual levels are too long. Maybe twice as many levels and half the waves? Other than that its a hell of a TD.
Really enjoy the simple style. Its like playing zelda with a simple quest system. I agree with the holding down click thing, spamming is annoying. But honestly it didnt stop me from enjoying the game. 5/5