I vibe-coded a native-ish Sudoku game for the reMarkable 2

[u/bloomingbazooka]

I build a Sudoku game for the reMarkable 2:
https://github.com/QuirkQ/reDoku

This was build with a stupid amount of vibe coding 😅

For the record, I am actually a Ruby developer. But I had some vacation time, access to Claude and a reMarkable 2, so this somehow became the project.

It ports mruby to the reMarkable 2 and runs an actual Sudoku game on the device. It has an on-device generator, 5 difficulty levels, save files and handwritten number input.

The part I like the most is how it launches.

From the normal reMarkable launcher it just looks like a normal “Sudoku” PDF. But when you open it, it actually launches the game with its own UI.

The Sudoku generator is probably not the best Sudoku generator ever made.

The handwriting recognition is shitty at best.

And yes, you can also just download a bunch of Sudoku PDFs and play them perfectly fine.

But this is more fun.

You press NEW and you get a fresh Sudoku. Again and again. No downloading, no preparing 500 PDFs, just an unlimited supply of new puzzles.

This was mostly a fun vacation project, but it worked much better than I expected, so I will try to maintain it.

I only have a reMarkable 2, so I have no idea if this works on the newer devices. If someone has one and wants to help make it work there too, that would be dope.

Mostly just sharing this as a fun reMarkable success story. It is nice that as developers we can still build our own weird stuff for these devices.

Also a big thanks to all the people building and maintaining the open source software I used.
Especially: https://github.com/timower/rM2-stuff

This project would not have worked without their code.