Every jar has a capacity. Pour the numbers you are dealt until it is exactly full: a full jar bursts and goes to the shelf. A number that would overflow is refused.
Burst the starred jars to win the level. Some jars have their own rules: a narrow neck only takes small numbers, and a wax-sealed jar stays shut until a starred jar next to it bursts.
Hold keeps the number in hand for later, Undo takes back your last move, Swap trades the number in hand for a new one. No level is timed. Finish with numbers to spare for more stars.



