use the buttons on the screen to move your rocketship. do not get hit by the asteroids your ship automatically shoots a bullet every .6 seconds. the cooldown for the next bullet is the red bar above your ship. during the bossfight the boss will move from left to right and fire a laser every 1.2 seconds, the cooldown formthe next ray is the red bar above the boss. the bosses health is shown on the top of the screen. your score is in the middle of the top of the screen, highscore is in the top left