1. Launch the game "Pen Run Online" on your mobile device.

2. As the game starts, a pen will begin running automatically on a table surface.

3. Slide your finger left or right on the screen to steer the pen in either direction.

4. Collect additional pens scattered along the path by guiding your pen to touch them.

5. Avoid obstacles such as books, pen containers, and other stationary items placed on the table.

6. If your pen collides with an obstacle, the game will end, and you’ll need to restart.

7. Keep collecting as many pens as possible while safely maneuvering around the objects.

8. Reach the finish line at the end of the table to complete the level.

9. The number of pens you collect will be added into the book at the finish line, boosting your score.

10. Try to collect more pens and avoid more obstacles in each run to improve your performance.

11. Use quick reflexes and smart sliding to navigate through tighter spaces and increasingly difficult paths.

12. Continue playing to unlock new levels and challenge your skills further with faster speed and more complex obstacle arrangements.