Rule 1: The primary goal is to fill the empty glass with liquid to make it happy.
Rule 2: You draw lines to guide the liquid into the glass.
Rule 3: The liquid is subject to gravity, so plan your lines accordingly to direct the flow.
Rule 4: You can create multiple lines and shapes to achieve the desired result.
Rule 5: Earn up to 3 stars based on the efficiency and creativity of your solution. Try to complete the level using the shortest line possible.

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Yes, you can erase or undo your lines to try again.

While there are no explicit penalties, using fewer lines often leads to higher star ratings.

If the liquid spills or doesn't fill the glass to the required level, you will need to restart the level.