You use the arrow keys to move the yellow dot. He can only go on grey. Try to get him on the red dot by dragging the tubes to places and moving the yellow dot. Be careful, you only get 2 of each kind of tube! There are invisible walls. If you drag the tubes on the invisible walls, they will go back to the place they started when you clicked the green flag. Drag the tubes to "Delete" and this will also happen.
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