Infinite health.
Try to survive the enemy attack for as long as possible. The enemy soldiers, tanks, armored cars and planes will attack from all directions. Do your best to destroy them before their fire range reachs the bunker.
Use YOUR MOUSE to aim and LEFT MOUSE BUTTON to shoot.
If you collect enough money you can buy new weapons after each level.
You are also given 10 health points after each level.
Have fun!