Drag back. Let go. Every stroke comes out of the tank.
Drag back anywhere and let go to putt: the dotted line shows your aim and the first bounce. Keyboard: arrows aim, hold Space for power. Every stroke costs 1 from the Stroke Tank. Sink it in par or better and the hole pays your strokes back, and a birdie, eagle or hole in one tops the tank up. Every bounce before the ball drops multiplies that hole's points. Run the tank dry and the round is over.
Five days in a row. Miss a day and it starts over.