Idle: Mine & Merge is a craft-based fighting game that features semi-idle incremental and merge play. The player's goal is to destroy enemy soldiers across many levels in a battle arena. They must also fight a boss now and then. To succeed with these tasks, they need weapons to kill their enemies. The only way to acquire weapons is by mining for blocks of soil and then merging the weapons to create even more powerful ones. The player digs up the blocks with shovels that they drop vertically onto the ground from a merge grid with spaces.
The player initially earns money by manually destroying one or more enemies with clicks. They use the money to buy and merge shovels. Once they have enough blocks from mining, they generate weapons that automatically slide back and forth across the battle arena through each enemy's body.
Idle: Mine & Merge displays the number of blocks total after digging at the top left corner. The player's current balance of coins is located to the right of this area. The costs of performing different tasks, such as generating shovels and auto merging shovels or weapons, incrementally increase over time. The player can also earn a money multiplier or open merge grid spaces by watching advertisements.
