In the walkthrough, the player is making consecutive jumps, but this game isn't allowing it. I have to wait to make a second jump and it makes it impossible to complete.
There seems to be 3 types of pitches... a fast straight ball, a change up (home run ball most times) and a slow high pitch which is always called a ball. You just have to recognize early in the pitch which one it is and either swing or don't. I got a 12 on my first play.
 "Red Ball"){kind=icon}
 "Penguinz"){kind=icon}
 "What The Fu... BOOM! 2"){kind=icon}
 "Downgrade Complete"){kind=icon}
 "Big Truck Adventures 2"){kind=icon}
 "dinokids baseball"){kind=icon}
 "Christmas Promise"){kind=icon}
 "Find Cheese"){kind=icon}
 "Blob Game"){kind=icon}
 "Back to the Cubeture (1)"){kind=icon}
 "run.don't.stop"){kind=icon}
 "Drag Box"){kind=icon}
 "I Hate Cute"){kind=icon}
 "Stick Cricket"){kind=icon}
 "Toy Blocks Balance"){kind=icon}
 "Monster Luring"){kind=icon}
 "Gateway I"){kind=icon}
 "Wheel It"){kind=icon}