1. Open it and select "Play" to start a new game.

2. Your ball will start moving automatically through the tunnel. Tilt your device left or right to move the ball in the corresponding direction.

3. The tunnel is made up of different colored sections, and you must move your ball through sections that match the color of your ball. If you hit a section that is a different color, you will lose a life.

4. Collect gems as you move through the tunnel to increase your score. The more gems you collect, the higher your score will be.

5. Avoid obstacles such as blocks and rotating barriers, as they will slow you down or cause you to lose a life.

6. Use power-ups such as speed boosts and shields to help you collect more gems and survive longer.

7. As you progress through the game, the tunnel will become more difficult, with more obstacles and challenges to overcome.

8. Keep moving through the tunnel and collecting gems to earn high scores and unlock new ball colors and themes.