Very nice and well made game. I managed to get to the point where I had filled every spot with the expensive turrets, and that got me to wave 20. Enjoyed the trying to find the optimal turret configuration part for the earlier stages, although it would be nice if you'd added somewhere (even the description, if u didn't have the time to put it in the game) an explanation of what each turret type does (maybe attack speed - damage - dps stats). But I figured the more expensive one would have higher dps so I went with that for the endgame.