you are a UFO that is in enemy territory you have to survive. red ships board your ship and mess with it. they will subtract 5 health, invert your controls, destroy your radar steal your amo, or give you 20 health. blue ships will get close to you and shoot you. the two dots on your ship are aiming dots use the w and s keys to control them. amo is on top left and health is below amo. There are more things in the game, play to find out.