The Game & Watch titles do have credits.
(Except maybe the first one, which was only released in Japan, as GameBoy Gallery.)
They are hard to get, though.
Usually, you have to get stars in each and every game (or something like that) by reaching certain scores.
You'll find more information about this on gamefaqs.
Ughh. You got it all wrong.
While the entire Game & Watch series does have credits, the one released only in the UK, Gameboy Gallery does not or unless you get a max score for every game does not have credits. I will send you credits for them soon.
Game and Watch Gallery 1 (Gameboy Gallery in Japan)
Coordinator Yasu Shimokawa
Coordinator Ichiro Takigawa
Programmer Sakae Takase
Programmer Toshifumi Hiroo
Programmer Takeshi Yamazaki
Designer Isao Shiroyama
Designer Eiji Tachibana
Composer Yoko Mizuta
Composer Jin Sugita
Design Adviser Takashi Tezuka
Translator Phil Sandhop
Translator Kayomi McDonald
Director Hitoshi Yamagami
Producer Takehiro Izushi
Game & Watch Gallery 2 (Gameboy Gallery 2 in Japan) in game order. I beat the game in three minutes for these.
Coordinator
Yasu Shimokawa
Ichiro Takigawa
Programmer
Sake Takase
Toshifumi Hiroo
Toru Fushimi
Taro Nagaoka
Designer
Isao Shiroyama
Design Adviser
Takashi Tezuka
Shigefumi Hino
Composer
Noriko Nishizaka
Saburo Sasaki
Yoko Mizuta
Manual Editor
Yasuo Inoue
Illustration Adviser
Yoichi Kotabe
Fujiko Nomura
Noriyuki Sato
Translator
Phil Sandhop
Kayomi McDonald
Keiko Tamura
Special Thanks
Nintendo R&D 1
Super Mario Club
Tose Co.,LTD
Atsushi Tada
Yoshihiro Maruyama
Maoki Inoue
Satoshi Konishi
Satomi Hasuike
Fumiaki Shimada
Maoko Nakayama
Teruhiro Oda
Narumi Mori
Drastic Factory
Produced By
Million Colors
Director
Hitoshi Yamagami
Producer By
Takehiro Izushi