This is pretty nice, well done! One suggestion: it would be nice if you somehow integrated the fix for each bug into the game somehow. At the very least, in th

This is pretty nice, well done! One suggestion: it would be nice if you somehow integrated the fix for each bug into the game somehow. At the very least, in the congratulations screen, you could show a version of the code updated to fix the concurrency bug. In other words, this helps you learn what not to do, but not so much on what you should do.