Seems we can count with a new version of GPPang again in the near future. Those lines were taken from it’s official homepage:

29 May 2003 – GPPang WIP Argg ! Big crash of my computer ! With luck i’ve done a backup of all my devkit and my sources code 5 minutes before the crash ! :)And the good news is : MUSIC ingame ! I must find and implement sfx, before releasing a new version.

http://perso.club-internet.fr/michel.louvet/index.html