I made a pixel pipeline explorer for the original Game Boy's Pixel Processing Unit (PPU). If you are implementing a Game Boy emulator or just interested in it then this might provide some help :)
Thanks for the kind words! Even though this is definitely meant for desktop screens, I really didn't want it to fall apart on mobile. As for upvotes, it's super niche so I wasn't really expecting even a single one tbh
Slightly related, are there any game boy like options for kids these days? My kids are reaching game boy age and I am against anything that can run roblox or YouTube. Switch is a bit large.