Very interesting. Kinda frustrating. The imprecise aiming and awkward click, click, click-in-tiny-zone-to-aim placement is not the most fun part of the game. (I suggest a real click-drag then on release, one more click to aim, with a larger aiming zone around the turret.)

Might want to add in some additional 'rescue' or defensive moves (walls?) to prolong the game.

But very unique, could prove really popular.