To control the game using keyboard: 'S' to start the game; 'R' to reset the game at any time.
Use cursor keys, PageDown, PageUp keys to move the guide line; Hold space bar to shoot. Use
Shift + cursor keys to move the cueball up or down along the shoot line. Use Ctrl + cursor keys to
move the cue ball anywhere.
To control the game using mouse: Press the 'Start' button to start the game; Press the mouse
on the play area and drag to move the guild line; Press the mouse button on the shoot power bar and
hold it to shoot. Click on the big Cue ball to select stick shooting position. Press on the cue ball and drag it to move it along the shooting line.
Hold the CTRL key and drag the cue ball to move it to anywhere.
