28th April, 2014 - Release S4/1.04 (Standard 4, various optimizations)
Minor fixes and optimizations to source code; normalized sound samples volume to
a higher level; added the new "About" screen.

19th September, 2011 - Release S4/1.03 (Standard 4, minor bug-fix)
Completely rewritten the routines that manage the score/hiscore display, which
contained a few math mistakes.

23rd May, 2011 - Release S4/1.02 (Standard 4, English manual added)
Added English instructions booklet in place of the Italian version.

22nd January, 2010 - Release S4/1.01 (Standard 4, minor bug-fix)
Fixed a bug in the instructions manual browser.

