Gas Fee Market 2D: EIP-1559 Priority Queue

Every mobile crypto wallet quietly runs this exact algorithm before it shows you a "gas fee" number. This 2D simulator renders the Ethereum EIP-1559 fee market as three linked panels: a scrolling chart of the base fee itself, a live priority queue showing every pending transaction ranked by how competitive its tip is, and a strip of mined blocks colored by how full each one ran. Raise network demand and watch the base fee compound upward, block after block, capped at ±12.5% per step exactly as the protocol specifies; drop it and watch the base fee decay back toward the floor. Submit your own transaction with a chosen max-fee cap and priority tip to watch it climb (or stall) in the queue and see, block by block, whether it gets swept into inclusion or left waiting in the mempool — the same trade-off a mobile wallet's "slow / average / fast" gas presets are built on.