The only suggestion I would have is to have a collider setup so that enemies can't go inside the extractor, as it makes it impossible to shoot by hand (although turrets work fine).
Great job!
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We had that but there was a bug where the enemies couldn't attack the drill so we removed the navmesh obstacle last minute. There is still a collider on the drills. I believe the gun uses a raycast, the turrets possibly don't (I didn't make them), that's probably why they work and the guns don't.
I'm glad you enjoyed it!