0.2.2:
   -Sandglass timer
   -11 levels
0.2.1:
   -Command line options (fullscreen, change tileset, set gravity)
   -Erase function removed
   -New functions: Undo and Save
   -Several new wall tiles and Levitator
   -Help in Edit mode, new Help pages
   -Edited level can be player from editor (P key)
   -Contains 10 levels
0.2.0:
   -Faster graphics
   minor upgrades and bugfixes
0.1.6:
   -Fullscreen mode (Options menu or F key)
   -Help screen is available while playing (F1 or H key)
0.1.5:
   -Highscores
   -Help screen
   -Now contains 7 levels
0.1beta2:
   bugfixes:
   -Edit mode: first level timelimit is displayed correctly
   -Memory leak fixed
0.1beta1:
   major changes:
   -Edit mode
   -Reload tool
