Pretty good concept for this game! The turrets themselves are pretty weak (and waaaay inaccurate even with upgrades), but it was fun aiming and shooting the upcoming enemies with the mouse.
Oh, I just read the comment where you said you can actually aim the turrets with right mouse click. Whoops!
I think that this is a very engaging/interesting game loop. With more variety and interesting upgrades, I could see this kind of game reaching successful numbers at itch/steam. Good job!