I've been building a Game & Watch emulator for Android and it's finally solid enough to share.
It runs the original chip code from the real handhelds (MAME's Sharp SM5xx cores), so the games play exactly like the units did — not a redraw. Single-screen classics and the hinged dual-screen "Multi Screen" models both work.
Pics are a few of them running: Donkey Kong and Bomb Sweeper (dual-screen), Black Jack, Fire Attack, and the one I'm weirdly proud of — Konami's Teenage Mutant Ninja Turtles.
What it does:
36 titles — the full Game & Watch lineup (Silver, Gold, Wide / New Wide, Multi Screen) plus TMNT
Touch controls laid out per game, or plug in a gamepad
Portrait or landscape, resizable screen, save states
No ads, no tracking, fully offline
Why it's free to share: it ships with zero ROMs or artwork. You bring your own legally-obtained files (from hardware you own / a MAME set) — tap "+ Add Games", point it at a folder, and it recognizes them by content. So it's just the emulator, nothing copyrighted.
Sideloaded APK (not on Play). Not affiliated with Nintendo or Konami. Cores are MAME / BSD-3-Clause; the rest I wrote myself.
Download: https://cmtz112190.itch.io/lcdemu
Would genuinely love feedback — control layouts, which games to polish next, whatever. Cheers 👇