You will take turns exchanging fire with the enemy. Bullets will bounce when they collide with walls.

On Your Turn:
Right Click to move.
Left Click to shoot.
Firing a bullet will end your turn.
Your bullet color will shift to green as it nears the enemy.

On Their Turn:

You will have a limited view of the map.
The enemy bullet might pass into view, giving you an idea where they might be firing from.