1. Open the Happy Filled Glass game on your mobile device.

2. Tap the screen to begin the level.

3. Observe the position of the water source and the empty glass.

4. Analyze the obstacles and layout to determine the best path for the water to reach the glass.

5. Use your finger to draw a line or shape on the screen that will guide the water flow into the glass.

6. Make sure your drawing allows the water to move smoothly and fill the glass without spilling excessively.

7. Once you finish drawing, release your finger to start the water flow.

8. Watch how the water travels along the path you created.

9. If the glass is filled to the required level, you will complete the level and move to the next one.

10. If the glass is not filled or water spills too much, you can retry the level by tapping the replay button.

11. As levels progress, new challenges and obstacles will appear, requiring more creative and precise drawings.

12. Continue advancing through levels by successfully filling the glass with water using your drawing skills.

13. Use logic and trial-and-error to solve more complex puzzles.

14. Enjoy the satisfying visuals and playful mechanics as you help the happy glass stay full.