I love the rts tower defense style!
Criticism - Finding the bugs was difficult, if the player could see the bugs better and the command center needed you to target them, it still would have fit the theme and made the quality much better. That way you could prioritize/strategize who to target, I just felt like the level of darkness was an unnecessary handicap.
Other than that the art when you could see it was awesome, the targeting system was really interesting, mapping the drone light focus to the mouse wheel was a really interesting mechanic. Great job!