Try to wrap around the platform to avoid several asteroids and ships. Your health bar is shown at the top left corner. If you get hit by an asteroid or enemy space ship fire, you will loose a certain amount of health. Destroy all the ships and asteroids to fill your level bar and proceed to the next level. There are three bars shown at the bottom left that are your power up levels. Your energy is topped by 25% as you move to the next level. Fire your laser gun by aiming with your mouse and clicking the left mouse button. Use the WASD keys to move around.