14th March, 2022 - Release 5.01 (Standard 5, graphics improvements)
Added directional cross graphics to simulate press in all four directions
(thanks to Itizso for providing rendered 3D model of the cross)

4th December, 2017 - Release 5.00 (Standard 5, complete rewrite)
Added a new option to the on-screen game menu, to enable the user to change
from fullscreen to windowed (shaped) mode on the fly; minor tweakings.

16th October, 2017 - Release 5.00 * PUBLIC BETA *
Officially released through an "open beta testing" program.

24th June, 2017 - Release 5.00 * PRIVATE BETA *
Implemented new graphics system based on "skins" for both the game and the
instructions manual; all of the skin options can be changed via the included
"config.ini" file; the visualization mode can now be changed to "fullscreen";
added a new key configurator panel (settings are saved into the system
registry); all game buttons can now be operated via keyboard, mouse and touch
screen; new splash screen; new "about" screen; minor fixes and optimizations to
the source code; added support for .png images; added on-screen menu to the
"fullscreen" mode; added option to the menu to allow the editing of the
configuration file.

29th June, 2015 - Release S4/1.02 (Standard 4, complete rewrite)
Completely rewritten source code in order to do major optimizazions, fix bugs,
etc. Included new much more detailed instructions manual than the previous
one.

3rd April, 2001 - Release S3/1.01a (Standard 3, minor bug-fix)
Fixed a minor bug in the game speed routines.

28th March, 2001 - Release S3/1.01 (Standard 3, final)
New standard: totally rewritten sound routines; Fmod sound library 3.31 added;
small bug-fixes and audio settings saving routines.
