Duck Shooting Game

1. Player 1 moves left or right using the A and D keys and shoots with the spacebar.

2. Player 2 moves left or right using the arrow keys and shoots with the / key.

3. Each player can shoot only once every 0.5 seconds.

4. If a duck hits a player, they are immune for 2.5 seconds, during which time they cannot be hit again.

5. If a player loses all their lives, the game is over and the other player wins.