Treasure Hunt mode
Players must use characters with different attributes, to drop bombs to break obstacles and treasure chests. When a chest is broken, they will have a chance to reward the player with a certain amount of coin or some form of equivalent reward item. When heroes drop bombs, they will lose stamina, and after their stamina is spent, they will need to rest. Certain things like houses can increase the stamina recovery rate of heroes.
When users amass more coins they will open new opportunities to purchase better heroes and items. Those in turn will accelerate their mining rate and enable them to earn coins more rapidly. That cycle is a form of expressing the model of financial investment that the gameplay emulates.