2007/08/09 - Version 1 released.

2007/11/19 - Version 2 released.

  - Icon modified to display in Mediawiki renderer correctly (works fine
    everywhere else).
  - Added a reward graphic when the level is successfully cleared.
  - Rewrote board data structure to one that should be more effective.
  - Improved level generator.  The old generator generated some unsolvable
    levels, and the rest were solvable in a certain way that makes the game
    easier once you know about it.  The new one should be more robust.
  - Implemented "new game" and "repeat game" functions.
  - Completed sliding animation.
  - Implemented undo/redo.
  - Added "sugarless" file for developing in a non-Sugar environment.
  - Ported sugarless code back to activity.
  - Added new, retry, undo, redo, easy, medium, and hard icons.

2008/03/29

  - Added Arabic translation courtesy of khaled.
  - Modified colors for better contrast in b/w mode.
  - Fixed ticket #5737: Implode smiley face draws over new game.
  - Added initial gamepad/keyboard support.

2008/04/01

  - Added Journal suspend/resume.
  - Version 3 released.

2008/07/17

  - Updated to run with new version of Sugar API.

2008/09/14

  - Augmented license information.
  - Added initial spanish translation.
  - Version 5 released.

2009/08/27

  - Added help screen.
  - Combined sliding/zooming animation.
  - Version 6 released.

2009/11/01

  - Updated toolbars (Michael Stone).
  - Version 7 released.

2009/11/25

  - Added stuck window to let player try again.
  - Version 8 released.

2009/11/28

  - Modified to use stuck strip notification instead of window.
  - Version 9 released.

2010/12/31

  - Packaging improvements suggested by James Cameron.
  - Incorporating new translations from SugarLabs Pootle users: Italian
    (carlo), Spanish (cjl), French (samybt), Vietnamese (Clytie), German
    (mschlager), Dutch (Myckel), Tamil (thangam.arunx).
  - Version 10 released.

TODO: 
- Rectangle invalidation could be improved.
- The code documentation and organization could be improved. Some
  calculations are repeated.
- Audio cues might be nice.
- Tracking win/loss statistics might be nice.