Seen on CPCWiki, you can see Barjack's web site with the graphics he did, including work in progress games :

• Bubble Quest for Amstrad CPC+ by Roudoudou, e-dredon, Toto and Barjack
• Renegade Metro (without more informations)

This site is a good news, the bad one is that he should stop Amstrad CPC activities when Bubble Quest is done...