ToDo

Level 7

- Add way to write to playfield
- Add construction to language to control the status bar in the
  bottom of the window.  For example writing a timer, score...
- Add HiScore dialog for games which computes score
- Add loosing special-effects...
- Add possibility to Save/Load game in progress (Note to myself :
  add a version number in compiled code and in saved game to make
  sure a saved game is used with the corresponding exec) 

Level 8

- Add a run-time module
- Add a way to stop interpretor when it is stuck in a loop
- Add a #include pre-processor

Level 9

- Graphical Programmation Interface for CardsWorkShop
  a way to create games without knowing how to program.

Level X - UnSure

- Add another deck of card without scalling, just displacement
  of shape on the card
- Add a byte-code peephole optimiser
- Add a byte-code debugger
- Add instructions and predicate to control the undo operations
  UNDO n, MARK n, predicate undo?