Rule 1: Thumb Fighter is a fighting game where you engage in a one-on-one thumb war.
Rule 2: You can choose to play either in single-player mode against the computer ("P1 vs CPU") or multiplayer mode against a friend ("P1 vs P2").
Rule 3: Select your thumb fighter from hilariously dressed-up digits, such as Blinky, Bobbie, Red Bro, or BatThumb.
Rule 4: The objective is to pin your opponent's thumb down for the longest duration possible.
Rule 5: Wait for the opponent's thumb to drop before jumping on top to secure the winning position.

Action: Player 1 uses the "A" key.
Action: Player 2 uses the "L" key.
Action: Both players must use their assigned keys to control their thumb movements and pin the opponent.

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Answer: Yes, you can choose "P1 vs P2" to play against a friend on the same computer.

Answer: You can still enjoy the game by selecting "P1 vs CPU" and battling against the computer.

Answer: The winner is the player who manages to keep their thumb pinned on top of their opponent's thumb for the longest time.