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

2. You will control a dragon flying through the air. To move the dragon, tap on the screen to make it fly up, and release your finger to make it fly down.

3. The dragon needs to eat bubbles to grow larger and score points. To eat a bubble, fly into it.

4. The game has two modes: Classic mode and Challenge mode. In Classic mode, you need to score as many points as possible before the dragon crashes into an obstacle or runs out of time. In Challenge mode, you need to complete different tasks, such as eating a certain number of bubbles or avoiding certain obstacles, to progress through the game.

5. As you progress through the game, the obstacles will become more difficult to avoid, and the bubbles will become more challenging to collect.

6. You can use power-ups such as speed boosts and shields to help you avoid obstacles and eat bubbles.

7. Keep eating bubbles and completing challenges to earn high scores and progress through the game.