Awesome
One of the better games i ever played here on NG.
But, like every sensible gamer, i must frown upon you for something drastic. The game has showstopper bugs... i have no idea how, but on lvl 69 hardcore, a shadow beastie ended up outside of the playing field... it was the first map (zigzag down) and i had the most solid defence money could afford... and then some. So i go downstairs to upgrade my instruments of doom, when i suddenly notice wave 69 is taking awfully long. So i go up and there it is... sitting outside of the hill, with the entire upper turret array going completely berserk. All i could do at this point was quit to the menu and frown upon you for letting such a critical thing slip past.
You made one hell of an outstanding game, but killer things like those are NOT welcome in any game whatsoever... I have no idea if i'll ever be able to replicate such a thing, but this sure knocks the fun out fast.
On a side note: You keep making em, i keep playing em... you make some of the best games here on NG, props to you sir.
In a nutshell:
Graphics - 9 (details + monsters = smexy monsters)
Sound - 8 (repetitive music)
Gameplay - 10 (nothing to add :D)
Overall - Epic win.