This game will die without multiplayer, the concept is perfect. Unfortunately playing alone is just too boring. The only thing you can do is build a fortress but what do you do after that? My friends have ZERO interest in single player survival/crafting games and thats a shame. MP would open up such a huge fan base; and with regular content updates you could even put a price on this game. Please keep up the good work and listen to feedback, you wont be disaapointed with where you can take this project.