The game is wonderful, the difficulty is just right. However, I must say that it is extremely frustrating to have to click the mouse to attack with your avatar. Why not just offer a button for attacking like z? Also, a fast foward button would be great because some of the enemies are really slow.
Honestly this is probably my favorite tower defense game on NG it doesnt really get old and its just so much fun. Cant Wait for a Sequel if you make one :)
Over all it was a fun game, there where some issues when alot of enemies end up on screen. It woud also be good to have a few other attacks for the guy you control, just to mix things up. Besides that it was a nice game.