28th April, 2014 - Release S4/1.03 (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 S4/1.02 (Standard 4, minor bug-fix)
Completely rewritten the routines that manage the score/hiscore display, which
contained a few math mistakes.

4th July, 2011 - Release S4/1.01 (Standard 4, manual added)
Added English instructions manual browser.
