rust-lang/rustlings ? reverse-engineered prompt

Build me a small Rust learning app like Rustlings, where beginners can practice reading and writing Rust with lots of short exercises. I want it to feel friendly and simple, with a clear setup flow, a way to work through exercises one by one, and helpful feedback when code is wrong so people can learn from mistakes.

It should include a set of practice files, a way to check answers, and a few examples that teach common Rust basics. If it makes sense, add a simple website or landing page that explains what it is, how to get started, and points people to the exercises. Keep the experience lightweight and beginner friendly, and make sure it works well as a guided companion to the official Rust book. If you need to look up current docs or best practices while building it, go ahead and do that.