Upgrade equipment: Weapon (attack bonus), shield (life bonus), wing (movement speed bonus) and mining pick (mining efficiency bonus); There are five types of pets: attack bonus, gold coin income bonus, life bonus, mining efficiency bonus and movement speed bonus; Virtual player: there are two virtual characters in the square that will attack the player's monsters: there are monsters of different levels around the square. The higher the level, the higher the attack power and health value. Treasure box: there are treasure boxes around the monsters. After opening, a random number of gold coins will appear