Hi this was really fun! I figured out how to play it and managed to get fully upgraded Turrets just before my castle died haha. However I don't think there was enough stone/metal on the map after a while. Other than that it was super fun!
You are quite right! The stone does run out if you spend it all on turrets. Maybe try killing the zombies by hand with your gun and see if you have enough left over to fix your ship? Not sure to be honest. lol
