• Maximum movement speed (0.5-5.0)
• Energy cost increases with speed
• Hungry creatures slow down
• Maximum possible body size
• Visual size = current weight
• Gains weight by eating
• Loses weight when starving
• Lower movement energy cost
• Better food → weight conversion
• Most important for survival
• Food detection range (30-300px)
• Decreases with age
• Elderly retain 10-50% detection
• Part of overall fitness calculation
• Average of ALL genes = reproduction ease
• Well-rounded creatures reproduce easier
• Energy: Speed × Weight × Efficiency
• Reproduction: Average of all genes
• Evolution: Fittest creatures reproduce more
• Aging: Detection declines over time