The idea behind it is nice, but I couldn't attack with my units at all sadly. One thing I noticed as well was the UI placements was really off. In the desc, it said click on the towers to place a certain one and I was only able to do this when I went fullscreen  in the browser. So I would suggest you to work on scaling the UI properly and fixing the scripts to allow the units to attack and you have a solid Tower Defense game. Sorry if I sound critical, I just would of loved to try this game out and I seen the ambition here.

I've tried everything, but it seems that I can't place down units or interact with the game in any way other than moving the camera :( Maybe it's an issue on my end? Since I couldn't play the game I won't rate it, but I do like the tree units in the picture for game, particularly the wizard tree lol.