Big City Stadium and Super Colossal Dome:
Win the Backyard World Series in season mode to unlock the Big City Stadium and Super Colossal Dome.

Mr. Clanky:
Win the Backyard World Series to unlock Mr. Clanky in the trophy box in the clubhouse. Click on him to use him in exhibition mode.

Hint: Easy hits:
After the ball is pitched, press [Space] to pause game play. You will be able to see where the ball is located. Move the pointer to where the ball is, press [Space] again to resume the game, then hit the ball.

Hint: Pablo speaks English:
Go to a screen where Pablo says things. Hold [Ctrl] + [Alt] + [Shift] and click on him. He will now speak in English.

Alternately, hold [Shift] at the screen where Pablo speaks.

Hint: Better Maria Luna:
Create a team, and make both colors pink. Choose Maria Luna for your team, and when you go to play she will be having a good day and have the following stats: Batting 9, Running 9, Pitching 9, Fielding 10.