Play Cannons
Although it's difficult to see, begin a new game by pressing the purple New Game button at the upper right side of the screen. You can choose to give one or both players a nickname. Click the Start button when you're ready to begin.
Player 1 is the cannon on the left side of the screen. The meter that appears will allow you to choose the velocity and angle of your cannon's shot. Be sure to look at the wind gauge at the top of the screen before adjusting your settings. It's also important to make your adjustments before the wind switches.
Click the Fire button when you're happy with your cannon's settings. You'll earn a point if you successfully hit the other cannon.
Directions
Select: Left Click