Publisher: Puzzy

Puzzy was a brand of Bit Corporation, a Taiwanese company that sold its Atari 2600 cartridges both under its own name and under the Puzzy label. The site has three Puzzy entries. Sea Monster is the European PAL cartridge of a simple shooter in which your ship drops depth charges on creatures swimming below, a little like Air-Sea Battle turned upside down. Sea Monster (NTSC) is the 60 Hz version of the same game, which usually plays a little faster.
The third is Space Tunnel – Le Tunnel de L’Estace, a bilingual English and French release of Bit Corporation’s 1982 shooter Space Tunnel. AtariMania lists it as a Canadian release. Its French title seems to contain a misprint of “l’Espace”. All three are below, ready to play in your browser.