Run it
The landing page already has the simulation running behind it. OPEN THE MARKET drops you onto the water.
Runs are seeded with a mulberry32 generator, so the same seed and config replay the exact same session, tick for tick. That determinism is what makes the lab comparisons and the stress suite possible.
Scenario presets
Three presets on the pond reset the engine into a known configuration. Each one exists to make something specific easy to watch.
| PRESET | SETUP | WATCH FOR |
|---|---|---|
| CALM | 8 frogs, 6 errands/min, 2 basking stones, normal sunlight, no outages | Single auctions playing out end to end. The best preset for learning the bid fan. |
| RUSH | 12 frogs, 14 errands/min, 3 basking stones, normal sunlight | The market at full throttle: crowded lanes, fast tape, congestion heat. |
| CRISIS | 10 frogs, 10 errands/min, 2 basking stones, scarce sunlight, a stone clouds over mid-run | Prices repricing the colony in real time when capacity halves. |
Controls on the pond
Speed runs from 0.5x to 4x, and pause stops the whole market (the TICK counter in the top bar freezes with it). Overlays paint the water: CONGESTION shows the crowding field that frogs route around, ERRAND VALUE shows where the money is. Click a frog to open its inspector, which includes the cost breakdown from its last bid. Click an errand to see the standing bids. FOLLOW locks the camera to a frog; the sound button at the bottom of the tool rail controls the voice pack.
The stress suite
The suite runs four scenarios for 30 sim-minutes each, headless, and checks the invariants that matter: no non-finite balances or positions, no frog stuck in a moving phase for more than 90 seconds, no ghost entries in basking queues, no errand left open longer than 200 seconds. It exits nonzero on any failure, so it works as a CI gate.