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GB Studio - A quick and easy to use drag and drop retro game creator
(www.gbstudio.dev)
Apparently that new Grimace McDonald's GB(C) game was made with it. Looks promising.
I saw this posted on Hacker News. Didn't get a chance to try it out yet but it looks interesting
Anything about retro gaming, arcade, 8bit, 16bit, 32bit. Emulators, devices, games and beyond.