Mini golf. Bumpers, sand, water, and one windmill.
Get the ball in the cup in as few putts as you can. Water costs a stroke. After eight strokes you pick up and move on.
Phone: drag back from anywhere and let go to putt. Drag further for more power.
Desktop: drag with the mouse, or aim with A/D or the arrow keys and hold Space to set the power. P or Esc shows the card.