Played it and reviewed it. Was much harder than I was expecting.
Do you get better weapons with the bunker and watchtower because with the paint gun it's hard to keep up with all the bots.
I wanted to reach the goal score so didn't get to call anything down the first couple of tries.
Playing solo is tough but not impossible.
I'll try and checkout the other buildings later. Running out of ammo is what got me the first few times so stayed close to the paint gun dispenser.