Aim & putt. Drag back from anywhere, like a slingshot. Further pull, harder putt. Let go to shoot.
Look around. Tap Look to scout the whole hole: drag to turn and tilt, pinch or scroll to zoom, two fingers to slide. Tap Ready to putt to shoot from the view you picked, or Back to ball to reset the camera. Top view gives a quick bird's-eye look.
Keyboard. ←/→ aim, ↑/↓ power, Space putts. Q/E rotate the camera, O for overhead.
Hazards. Water and black holes cost a stroke and send you back. Sand is slow, ice is slippery, chevrons boost you.
Portals & cannons. Roll in to pop out somewhere else. Not all of them help.
Scoring. Fewest strokes wins. Eight strokes and the ball is picked up.