20 questions on crypto fundamentals and history, Bitcoin's origins, blockchains, Ethereum and the key ideas, over four tiers up to Legends. The better you do, the harder it gets!
Climb up: 2 right in a row bumps you up a difficulty level (1 → 2 → 3 → Legends).
Slip down: 2 wrong in a row drops you back a level.
Knocked out: 4 wrong answers in total ends your run.
Beat the clock: you have 2 minutes to answer all 20 questions.
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