23rd February, 2015 - Release S4/1.03 (Standard 4, complete rewrite)
Completely rewritten source code in order to do major optimizazions; designed
new graphics; updated to the new standard "S4"; re-recorded sound samples
volume to a higher level; fixed several bugs; added a brand new splash screen,
allowing to hide/display it at the next startup.

Completely rewritten source code in order to do major optimizazions; designed
new graphics; updated to the new standard "S4"; normalized sound samples
volume to a higher level; fixed several bugs; added the new "About" screen.

August 9th, 2001 - Release S3/1.02 (Standard 3, manual added)
Added manual; Fmod 3.33a added; high-score and game over routines modified to
match the game manual specifics.

March 21st, 2001 - Release S3/1.01 (Standard 3, final)
New standard: totally rewritten sound routines; Fmod sound library 3.31 added;
new splash-screen and minor updates.