This HTML5 city simulation game features a sophisticated autonomous building system that manages resource production, citizen AI, and urban expansion. The game implements an interconnected grid where intelligent "Ultra Sims" move dynamically, seeking homes, jobs, and entertainment while their happiness affects city-wide metrics. A queue-based auto-construction system analyzes population needs and builds appropriate structures-residential zones for housing, commercial districts for income generation, industrial areas for jobs, parks for happiness boosts, and essential infrastructure like power plants and water facilities.

The economic model includes realistic income streams where water facilities become profitable once the population exceeds 100 citizens, creating a progression-based revenue system. Advanced features include weather effects (rain, snow), natural disasters (earthquakes, fires, tornadoes), and special citizen types with coding knowledge who can autonomously construct parks. The visual design uses gradient backgrounds, glowing effects, and smooth animations to create an engaging metropolitan atmosphere while maintaining functional gameplay mechanics.

Get Started in 3 Simple Steps:

1. Copy the Code: Visit [https://pastebin.com/PBQbghXV] and copy the complete HTML code

2. Save as HTML: Paste into Notepad, save as "UltraCityBuilder.html"

3. Launch & Play: Double-click the file to open in your browser and start building your autonomous city empire

Watch your digital citizens thrive as they build their own parks, navigate weather patterns, and survive disasters while your city grows into a sprawling metropolis!