Same colour feeds. Wrong colour jams.
·Tap an arrow and it flies the way it points. Reach the edge and it's gone.
·Hits a same-colour arrow → they merge, and the one ahead gets stronger. Two arrows for one shot.
·Hits a different colour → both jam. Two cells lost, one life gone.
·A strong arrow punches through whatever is in front — through its own colour free. Every field gives you a fixed number of shots: run out with arrows left and you lose a life.