21st April, 2014 - Release S4/1.02 (Standard 4, various optimizations)
Minor fixes and optimizations to source code; normalized sound samples volume
to a higher level; added the new "About" screen.

9th June, 2011 - Release S4/1.01 (Standard 4, minor bug-fix)
Fixed a bug which caused the main sprite to disappear after the bonus score
intermission.