Here are the sound credits for
arcade of Asterix.
Sound effect: J-Kane
Music composer: Mutsuhiko Izumi, M. Egawa, Michiru Yamane (Chiru Chiru), Junya Nakano, A. Hashimoto.
M. Egawa should be "Mariko Egawa" but I'm not sure, while some places like arcadehistory.com or wikipedia report an erroneus M.Egama.
No idea for what A. Hashimoto stand for.
Hexion composer are: Junya Nakano, Yuji Takenouchi, Satoko Miyawaki; infos from
here. No infos are available at the end of the game since it's an infinite puzzle game.
Can someone put some scans of the booklet, it will be interesting. LuxKiller?