What do you need to do in the Happy Glass game?

What color is the water that is usually poured into the glass?

How to make the glass smile again in the game Happy Glass?

After passing the level perfectly, how many stars can you get at most?

Is the level of difficulty in Happy Glass the same for each level?

Happy Glass is a physics-based puzzle game.

In Happy Glass, you can only draw straight lines.

In Happy Glass, you must pass the previous level in order to unlock the next level.