1. Launch the "Brick Breaker Retro" game on your mobile device.

2. Once the game starts, you will see a paddle at the bottom of the screen and multiple bricks arranged at the top.

3. Tap and drag your finger across the screen to aim the direction in which the ball will launch.

4. Release your finger to shoot the ball toward the bricks.

5. The ball will bounce off the walls, ceiling, and bricks. Each brick may require one or more hits to break.

6. Move the paddle left and right by sliding your finger along the bottom of the screen. This allows you to bounce the ball back up and keep it in play.

7. Try to keep the ball from falling below the paddle. If it does, you will lose a turn or life, depending on your current level.

8. Break all the bricks to clear the level and progress to the next stage.

9. Some bricks may drop power-ups. Catch these power-ups with the paddle to gain special abilities, such as multi-ball or increased paddle size.

10. Avoid missing the ball and try to aim strategically to clear difficult brick patterns.

11. Continue through levels and challenge yourself to beat your high score.

12. Enjoy the classic retro gameplay and use it to relax or pass the time.