After you select your Moomoo.io character, you start the game. You must collect some raw materials to improve your character and build your castle. The raw materials in the game are gold, food, wood and stone. To collect gold, you must hit the object made of gold. In addition, it is possible to increase the amount of gold by installing the windmill. To increase the amount of food you must hit objects or cacti like fruit tree. Trees can increase the amount of wood. To increase the amount of stones, just hit the stones. When your raw materials are sufficient, you can start building your own castle.