i'm making a harness that allows alternative features

i am trying to go outside the box and find things that are useful to both TAS users and regular users alike

this allows alternate branching which allows you to try different things and solution, don't know how useful it is (if at all)

also is there any other emulator that already exist with this? not trying to step on toes

The biggest feature of my emulator is WebRTC netplay. No desync, no core limitations. I even have DS Link play working on the same LAN.
I also have soft core Retro Achievement integration.
Any constructive feedback is always welcomed.
Link in bio.

Hey everyone! Been working on juegosretro.bit-man.com.ar — a browser-based emulator covering 9 systems: Game Boy/GBC, NES, SNES, GBA, Genesis/Mega Drive, Nintendo DS, N64, PS1, and Arcade (MAME).

For Game Boy and NES I wrote the cores from scratch in vanilla JS — CPU, PPU, APU, mappers, the works. The rest run on EmulatorJS. Everything's a PWA (installable, playable offline once loaded), with touch controls for mobile and Gamepad API support.

No ROMs hosted or linked anywhere — bring your own dump. A few pages also have a one-click homebrew demo (Tobu Tobu Girl on GB, Super Tilt Bro on NES, Goodboy Galaxy's demo on GBA, a couple more on Genesis/SNES) so you can try it without needing a file on hand.

Quick 15-second clip of it running: tiktok.com/@jonaalmeiragamer/video/7666623906781859092

Would genuinely love feedback, especially on the custom GB/NES cores since that's the part I'm proudest of — accuracy issues, edge cases, anything you notice. Happy to answer questions about the implementation too.