My understanding is that most cheats for retro consoles are a memory location plus a value to write in that location.

I believe that’s how the “game genie” worked on nes, snes, and OG game boy. Have you tried entering some game genie/game shark codes in the RA cheats for your core?

It’s been a while since I used cheats on RA other than save states and rewind but I know I’ve gotten them working before (years ago) on snes

Any progress/news re: C# web export?

Fake-08 development trails PICO-8 so it’s possible your Fake-08 version is out of date, the cart is made with a newer PICO-8 version, or the cart is just plain incompatible with Fake-08 (many carts do not work with Fake-08).

I have a couple handhelds like yours and the official raspberry pi PICO-8 build works great on them - I suggest you get a PICO-8 license and check your distribution’s documentation to learn where to place the raspberry pi PICO-8 binary in the filesystem.

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Aseprite I believe has a Linux build. Paid software but worth every penny.