The phone is the ball in your hand.
Your swing is the ball: a lazy swing rolls a lazy ball, left goes left, let go early and it drops there. Let go up to a beat after the bottom and the ball leaves from the bottom (thumbs lift late); later than that it lofts. You stand still, so the game adds the walk of a real approach to every forward throw. Aim Normal keeps a quarter of how far off your line is (a phone swing scatters more than a real one); Pro is 1:1. Bumpers put rails over the gutters. Your first game starts with a line-up: three practice swings at an empty lane that fit straight ahead to how the phone sits in your hand (redo it from the pause menu).
Mouse (fallback): down to swing back, up to swing through, hold left button to grip, release to bowl. Z/X twist, Esc pause, M mute.