The commands are executed by selecting the command in the menu and moving the mouse while the left button pressed.
Aim - Aim the cue stick. Press and hold the left mouse button, and move the mouse to aim.
Fine Aim - Fine aim the cue stick. Press and hold the left mouse button, and move the mouse to fine aim, while this option is selected (alternatively press CTRL + left mouse button + mouse move).
Shoot - Press the right mouse button and adjust the cue stick's distance from the cue ball. Move the mouse up to strike. The faster you move the mouse up the harder you hit the cue ball.
Elevate - Adjust the vertical angle of the cue stick up to 20°
Spin - Gives spin (english) to the cue ball