More very Small Games:

50 lines of code Pokemon Blue:
https://github.com/binji/pokegb/blob/main/pokegb.cc
pokegb – Making Of Blog:
https://binji.github.io/posts/pokegb/
Also uCity (128 KB):
Open Source GBC "SimCity" game that i did like more that Micropolis
https://github.com/AntonioND/ucity/releases
I think someone made a game fit in a twitter post (140-280 characters ?) too one time, but can not find it anymore.
Finally there is PICO-8:
All game are a 32kilobytes(.p8) PNG imagem.
Personally i did like:
Delunky - Spelunky Demake
https://www.lexaloffle.com/bbs/?pid=56554
Fuz - Fez Demake
https://www.lexaloffle.com/bbs/?tid=34188
PicoFox - Starfox Demake
https://www.lexaloffle.com/bbs/?tid=28067
SlipWays (Build a vast interstellar empire)
https://www.lexaloffle.com/bbs/?pid=51835
Like Celeste it was made in Pico-8, and after a "normal" game.
https://krajzeg.itch.io/slipways
https://krajzeg.itch.io/slipways-game
and Celeste (Original)
https://www.lexaloffle.com/bbs/?tid=2145
https://store.steampowered.com/app/504230/Celeste/
Etc... checkout:
https://github.com/skyforce77/awesome-pico8-clones
There somes that i did NOT play but looks nice:
Wolfenstein 3D ("FPS") (Wolfenstein 3D)
https://www.lexaloffle.com/bbs/?tid=28423
Pico Racer (Out Run)
https://www.lexaloffle.com/bbs/?tid=3198
Pico Empires (Age of empires)
https://www.lexaloffle.com/bbs/?tid=30453
Bombmans (Bomberman)
https://www.lexaloffle.com/bbs/?tid=2792
DeFacto (Factorio)
https://www.lexaloffle.com/bbs/?uid=11048
Low Mem Sky (No Man's Sky)
https://www.lexaloffle.com/bbs/?tid=32724
Picopolis (Simcity)
https://www.lexaloffle.com/bbs/?tid=29590
Pico Monsters (Pokémon)
https://www.lexaloffle.com/bbs/?tid=4046
Super Mario Bros. (Super Mario Bros.)
https://www.lexaloffle.com/bbs/?tid=28942
Picotris Attack (Tetris Attack)
https://www.lexaloffle.com/bbs/?tid=2925
Nanoman (Megaman)
https://www.lexaloffle.com/bbs/?tid=29017
PicoKart (Mario Kart)
https://www.lexaloffle.com/bbs/?tid=2886
The Story of Zeldo (The Legend of Zelda)
https://www.lexaloffle.com/bbs/?pid=39951
All PICO-8 games are Open Source, just click in "Code" buttom at bottom.

50 lines of code Pokemon Blue:
https://github.com/binji/pokegb/blob/main/pokegb.cc
pokegb – Making Of Blog:
https://binji.github.io/posts/pokegb/
Also uCity (128 KB):
Open Source GBC "SimCity" game that i did like more that Micropolis
https://github.com/AntonioND/ucity/releases
I think someone made a game fit in a twitter post (140-280 characters ?) too one time, but can not find it anymore.
Finally there is PICO-8:
All game are a 32kilobytes(.p8) PNG imagem.
Personally i did like:
Delunky - Spelunky Demake
https://www.lexaloffle.com/bbs/?pid=56554
Fuz - Fez Demake
https://www.lexaloffle.com/bbs/?tid=34188
PicoFox - Starfox Demake
https://www.lexaloffle.com/bbs/?tid=28067
SlipWays (Build a vast interstellar empire)
https://www.lexaloffle.com/bbs/?pid=51835
Like Celeste it was made in Pico-8, and after a "normal" game.
https://krajzeg.itch.io/slipways
https://krajzeg.itch.io/slipways-game
and Celeste (Original)
https://www.lexaloffle.com/bbs/?tid=2145
https://store.steampowered.com/app/504230/Celeste/
Etc... checkout:
https://github.com/skyforce77/awesome-pico8-clones
There somes that i did NOT play but looks nice:
Wolfenstein 3D ("FPS") (Wolfenstein 3D)
https://www.lexaloffle.com/bbs/?tid=28423
Pico Racer (Out Run)
https://www.lexaloffle.com/bbs/?tid=3198
Pico Empires (Age of empires)
https://www.lexaloffle.com/bbs/?tid=30453
Bombmans (Bomberman)
https://www.lexaloffle.com/bbs/?tid=2792
DeFacto (Factorio)
https://www.lexaloffle.com/bbs/?uid=11048
Low Mem Sky (No Man's Sky)
https://www.lexaloffle.com/bbs/?tid=32724
Picopolis (Simcity)
https://www.lexaloffle.com/bbs/?tid=29590
Pico Monsters (Pokémon)
https://www.lexaloffle.com/bbs/?tid=4046
Super Mario Bros. (Super Mario Bros.)
https://www.lexaloffle.com/bbs/?tid=28942
Picotris Attack (Tetris Attack)
https://www.lexaloffle.com/bbs/?tid=2925
Nanoman (Megaman)
https://www.lexaloffle.com/bbs/?tid=29017
PicoKart (Mario Kart)
https://www.lexaloffle.com/bbs/?tid=2886
The Story of Zeldo (The Legend of Zelda)
https://www.lexaloffle.com/bbs/?pid=39951
All PICO-8 games are Open Source, just click in "Code" buttom at bottom.
