[Media] I added 50+ Rust quiz questions to Cratery, free to solve

I built Cratery (https://cratery.rustu.dev), a free Rust quiz site where you read a short code snippet, pick an answer, get a hint if you want one, then see a full explanation. I just added 50+ new questions, so there are now 190+ across 9 topics like ownership, lifetimes, traits, concurrency, error handling, and the borrow checker. No signup needed to play, progress saves in your browser, and there is also a random "Practice 5" mode, community-made quests, and a weekly coding contest if you want more. If you are learning Rust or brushing up before interviews, I would love feedback on what feels too easy or too hard.