Nice Game, I had fun. But the radius of when you first get notified by the scanner could have been a little higher or have some other method that helps to find them. I reached the edge of the map in two directions before getting the last signal, the entire game started to lag a lot, and I was getting resources at a rate where the signal extenders became unnecessary. 

I think the frame drops were mostly from the turrets, as night became almost a slideshow.

Also, if possible, having directional audio for the scanner could help to make locating less of a pain.