You can use your finger to draw water and make the glass filled up with liquid. You can pour as much as you want. The more you pour, the more the glass will be filled up. When the glass is full, you can pour again.

You can earn more stars by solving the puzzles. You can use your brain and find the most efficient solution to each puzzle in this game.

There are multiple ways to solve each puzzle. You can try to make the glass happy or use multiple solutions. You can find all the levels for free by earning stars in previous levels.

The puzzles are not that hard.