Just Get 9 now measures and reports player achievements

Version information / Changelog

This is release “patch 2”.

Changes in “patch 1”

• When you reach 9 (or higher), the background of the “you win” text is now darkened for more readability. (Thanks @roudoudou for noticing the reduced readability.)
• The button to start playing is not longer labeled “PLAYGRID” but “PLAY”, or “GRID” when game is over. (Indeed you can see and study the grid as will, after game is over before starting a new game.) (Thanks Didier, @eto, @Logiker for reporting the wish to change wording.)
• Fix broken link in this very README file. (Thanks to Nicholas Campbell from cpcgamereviews.com for reporting.)
• Add section about copying.

Changes in “patch 2”

• In-game menu explicitly offers to quit the current game.
• In a number of circumstances, display current “achievement”. It is the value, number of moves and time since game beginning at the moment of the highest tile obtained. Shown:
  • when a new number is achieved,
  • in the in-game menu,
  • in the “quit game?” screen
  • on game over
• “How to play” page mentions that pressing “Esc” shows achievement and menu.
• Adjusted main menu layout.
• Improved consistency of the user experience overall (e.g. the main menu shows either plain background or last grid, but no remnant of previous screen, “game over” display is the same whether it just happened or you return to the grid).
• In main screen without current game, pressing Esc screen advances to next automatic screen, instead of starting a new game.
• C part compiled with stronger optimization level, yielding slightly shorter code.
• Minor manual cleanup, removed dead code.
• Minor internal optimizations here and there.