1. Open the Smiling Glass game on your mobile device.

2. Begin by selecting a level to play. Levels increase in difficulty as you progress.

3. Observe the layout of the level carefully. Look for obstacles, spikes, walls, and platforms that may affect the flow of water.

4. Your goal is to fill the glass with the required amount of water to make it smile.

5. Touch and hold the screen to start releasing water from the faucet or source point.

6. Control the flow by adjusting how long you hold your finger on the screen—short taps release less water, while long presses release more.

7. Avoid letting water spill too much or hit spikes and traps, as it may reduce the amount of water reaching the glass.

8. Use the environment to your advantage. Some levels have moving parts or tilted surfaces that guide the water.

9. Once the glass is filled to the target line, the level is completed and the glass will smile.

10. If you fail to fill the glass adequately or spill too much water, you will need to retry the level.

11. Continue through levels to face new challenges and more complex obstacles.

12. Practice timing and precision to master each level and make every glass smile.