CacheFlow
A tall sand board with a strip of sky across the top. Colored balls rest on the sand in the sky band and a cup of each color waits lower down. Water pours from a spring and floods whatever has been dug out. Drag one finger across the sand to dig it away, continuously, while the world keeps running: the water follows the channel you cut and carries each ball along it. Wooden planks cannot be dug and spiked blades destroy a ball they touch. You win when every ball is resting in the cup of its own color, and you lose the moment a ball is destroyed, enters the wrong cup, or leaves the board. On a keyboard the arrow keys move a dig point around the board and Enter or the space bar digs at it, one bite at a time.
Drag to dig The water carries the ball Match every color to its cup
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