Bacterium is an artificial life simulation where you design microscopic organisms and watch them evolve, fight, eat, and reproduce in a petri dish. Each creature has a neural network brain that mutates across generations, learning to hunt, flee, and mate on its own. Build your organism from components - spikes for attack, flagella for speed, receptors for awareness, membranes for defense. Choose your look, drop them into the dish, and see if your lineage can outlast the competition. Features: - Design custom organisms with pixel art editor -Neural networks that evolve through natural selection - Multiple levels with unique challenges - 9 visual styles plus custom cell designs - Track lifetime stats across all your experiments - Watch ecosystems emerge from simple rules