The Finger Game

(Don't ask)

This took me about 30 minutes, and I'll add some more functionalities and stuff later.

Rules:
At the start of the game, hold out one finger on each hand
You and your opponent takes turns
On your turn, hit your opponent's hand with your hand.
When your hand is hit, you add the number of fingers that are held out on the hand that hit you to the number of fingers in your hand now.
The object is to get both of your opponent's hands to exactly five.