Instructions
shoot the bad airplane with the spacebar. go back and forth to dodge its shots. get the mystery box to change your airplane. get the heart box to get more hearts.
The movement of the spaceship is controlled by the up and down arrow keys. By pressing the spacebar, the spaceship shoots laser at the rock. When the laser touches the rock and disappears, you get 100 points. When the rock touches the spaceship it is game over.