ArmandSwirc/EmergentLife ? reverse-engineered prompt

Build me a small Godot game called Emergent Life where I can watch simple creatures or cells move around, react to the world, and gradually feel alive through their behavior.

I want a playable prototype with a clean main scene, some basic UI for starting, pausing, and resetting the simulation, and a world that can be tweaked while it runs. The creatures should have simple movement, resource seeking, and basic survival or reproduction rules so the system feels like it grows on its own. Please make it look decent with placeholder art or simple visuals, and use shaders or effects only if they help the experience.

Set it up so the project runs cleanly from the existing Godot files, and organize the code in a way that makes it easy to expand later. If you need to check anything about current Godot behavior, look up the latest docs online.