looks like https://www.riverlanguage.org

> River is an experimental assembly-like programming language.

Hmm, I don't think so, doesn't seem similar. I see a mario.chr in the next tab, seems NES-related. Pretty sure it's our beloved 6502 :)

Author here - yes you caught me. I'm building an asm IDE in C (which is why I ended up building this layout library in the first place) and the screenshot is from that application, specifically while building a NES game for Pikuma's NES/6502 course :)

Great work Nick. My email is in my profile, could you send me an email I would like to get in touch.

Both Clay and the IDE look awesome!

What is? Is there a compiler with 6502 target that has uint64_t? :)

The first demo application screenshot.

Oh, I see, thanks. ASM for the NES or something.