Kick the ball once and again in the air to earn points. With all classes of combos and special bonus, that come enclosed in color balloons; but be careful with the green balloons having a red cross: they announce danger. You have a limited amount of time, but you can extend it with the balloons with clocks.
Move the mouse to move to left/right; click to kick; 1-2-3 keys to change character; A-S-D and Z-X-C keys for different punches (A-S-D for high punches and Z-X-C for low ones). Use the Q key to change the quality of the game; and W key to go back to main menu.