let Rust CODING RPG

An educational app for learning Rust and Go through RPG-style battles, chaptered lessons and flashcards.

What it is

Learn Rust and Go programming as if you were playing an RPG. Ideas that trip people up, such as ownership, borrowing and lifetimes, become weapons, enemies and skills in a world you explore a little at a time.

Read, watch, listen, fight

Read: 50 chapters that build up from the basics. Look up a technical term in the dictionary right where you are.
Watch: in the Lab, step through how ownership moves and borrowing works in memory.
Listen: a podcast that goes over each chapter by voice (more chapters are being added).
Fight: quiz battles, and a code-repair boss fight at the end of a chapter. Streaks raise your damage, and bosses change form halfway through.

Your character grows with what you read and solve. Experience, gold, titles and daily missions help you keep going.

Try Go for free

The basics of Go (goroutines, channels, interfaces and more, 5 chapters) can be tried without buying anything.

No connection, one-time price

All your learning data stays on your device. There are no ads.
The app connects only to confirm a purchase.
A one-time 980 yen opens every chapter of the main Rust course. There are no further charges.

Who it's for

Anyone who wants to learn Rust, even with no programming experience
Anyone who has tripped over ownership, borrowing or lifetimes
Anyone who wants to keep going a little at a time, in spare moments
Anyone who wants to learn in a way that feels like a game

A development journal on note

On note (in Japanese) we write about how the software comes together: how it was designed, where it got stuck, how it was tested and why things were decided, including what did not work.

Read the journal on note

Privacy and terms of sale

Privacy policy (the common policy and this app's part)
Legal notice under the Specified Commercial Transactions Act (Japanese; in-app purchases)

Contact: [email protected]