Cool, I was just recently looking at some TD games and this game perfectly matched my needs. Loved that the character can be part of the defense, so you have something to do while the wave is running.
The only change I would make is to attack where the mouse is pointing - the first few waves were a bit stressful as I trying to move out of the way of the monsters, but also shoot them at all the time, so yeah.
Great game overall!