Pond Spawn

Pond Spawn is a zero-player artificial life simulator powered by a deterministic Rust engine compiled straight to WebAssembly. Hundreds of neural-network-driven creatures compete in a continuous-space pond where they forage, mate, and adapt under strict thermodynamic rules. There are no pre-scripted behaviors; every strategy emerges purely through natural selection over thousands of generations. You can watch species form distinct physical shapes and build complex strategies, inspect individual brain activations in real time, or step in with god-mode powers like apex predators and environmental disasters to see how the ecosystem recovers.