Get +1 point for each row of asteroids you have passed. If you hit an asteroid you are immediately dead.
Collect items to increase your score - but be careful, not all items are a good choice. Choose your way through the asteroid field wisely.
The 'Green Box' will increase your score by 10 points.
The 'Blue Box' increases your score by 5 points and restores 1 life point.
The 'Red Box' decreases your score by 5 points, cost and will cost you 1 life point. If you have no more life points left and hit this item, you're dead.
The 'Yellow Box' will decrease your score by 10 points.
Earn achievements by getting a higher score and by collection the boxes.