LEDGER DEFENDER

A quick briefing

How to play

• Move with the on-screen arrows, by dragging across the board, or with the left and right arrow keys (or A and D).
• Fire with the Zap button or the space bar. On a phone, dragging also auto-fires. You are blocking bad transactions, not battling anyone.
• Zap red tokens. Each one is an invalid transaction, and you will see why it would fail.
• Do not zap gold tokens. Those are valid transactions. Let them reach the gold ledger line to be validated and to learn a fact.
• Zapping a valid transaction, or letting an invalid one through, costs a life. A consensus shield can absorb one mistake.
• Every third wave is a fork attempt. Fire consensus votes until more than 80% of trusted validators agree to reject it.
• Each wave ends with a short multiple-choice riddle. Pause any time with Pause, P, or Escape.