inancgumus/learngo ? reverse-engineered prompt

Build me a Go learning project that teaches by doing, with lots of tiny examples, exercises, and quizzes. I want it organized into clear lesson sections like getting started, variables, if, loops, arrays, slices, maps, structs, functions, pointers, and a few small projects so someone can practice as they go.

Each lesson should be simple enough to run and fix on its own, with broken or incomplete code that helps the learner spot mistakes and understand the concepts. Please also include a few more advanced topics like concurrency, interfaces, and parsing text, plus some fun mini projects such as a clock, a file finder, a bouncing ball, a spam masker, and a text wrapper.

Make it easy to browse from the main entry point, and keep the examples beginner friendly. If you need current Go docs or best practices, look them up online so the examples stay modern and idiomatic.