Thanks for the feedback. We will add more feedback for resource collection, (trees and rocks) and also make the enemies spread out a little. Did you build any turrets? The controls are in the screenshots. Cheers for playing and rating!
You get resources from shooting the rocks and trees but unfortunately I didn't have time to add all the particle effects when harvesting, so there isn't any feedback! Sorry about that. It will be in the next update for sure.