Using

the Joystick, press button 1 to move the left flipper and button 2 to
move the right flipper. The up axis controls both flippers simultaneously.
Button 2 launches the ball. Down axis tilts the game.

Addendum to the documentation: You start with 5 pill bug balls instead of 3.

SLINGSHOT

Use the Mouse to play Slingshot.

Move the mouse to aim at the target, then click the left mouse button
to fire at your target.