Very good game! I would just suggest more levels and an improvement when it comes to the upgrades, they could change the appearence of the itens that were upgraded!
Hey Nexon, I got a suggestion: try to balance the usage of metal and wood. We, players, use MUCH more wood than metal. It is annoying to have a full metal stock and no wood! Thanks!
We are working on lots of new features like co-op, crafting, and PvP. Look to future updates!