Handle file I/O exception.(Fault Tolerant Design)
Upgrade: Text transit process upgrade.
SpecChange: Setting of "Sound Off" affect to Openning Logo screen.
SpecChange: Save customized design of piece.
Bugfix: Not save ranking data.
Bugfix: Err when player name is set to null string.
Bugfix: some small things.
New Build up and validates for WP7 Marketplace.
New version released on Marketplace.
Upgrade: Add Customizable Design of piece.
Changed design of some screens.
New Build up and applies for WP7 Marketplace.
Released Windows Phone7 Marketplace.
Upgrade: Added "About..." screen.
Changed "Pause(Rule)" description.