thank you for the game. here is my reply:
1. It was very easy to place the towers and I knew what the range of the towers were for the sniper and the gunner. I would like to know about the range of the drone tower, as it only shows the drones flying about.
2. I think that a picture of the type of enemy coming would improve the interface as well as giving me a chance to add a tower based on the enemy coming
3. I think that the difficulty was good where it was. the bigger monsters give you an incentive to save your credits to build more towers, and the Leviathan really shakes up the way you play.
4. I was able to see the health of the towers, but I could go for a health bar over each of the towers as well.
I also noticed a graphical glitch whenever you put a tower near the settlement. part of the wall disappears where the tower is. other than that, it was a good prototype.