Good but too damn hard.
I like the idea of this game but i couldn't get past the first level, in my opinion the enemies are too close together so a turret swaps target when it only has to fire one more shot at the previous target to kill it i've tryed spacing the turrets out as far as i can but it still doesn't work.
In my opinion you could add some tips of how to set up so you don't have to try the first lvl a dozen times to figure it out.