Ultimate City Driver

Cinevva's analyzer read this game's design doc and its source, then wrote the brief below. "Make your own" hands it to the game creator as your opening message, so you start from a real spec rather than a one-line idea.

Create a playable 3D driving game titled “ULTIMATE CITY DRIVER.” Use a third-person urban driving environment rendered in a clean, slightly stylized low-poly aesthetic: a large dark asphalt city grid with multiple intersecting roads, thin yellow lane markings, a muted green-gray ground plane, blocky mid-rise buildings in varied blue/gray/brown/green tones, occasional rooftop blocks, many simple park trees, and a low bridge spanning the distant city. Use soft shadows, atmospheric fog, and a cool desaturated blue-gray sky. The scene should feel like an open city rather than a race track, with the player able to drive around a broad 260x260-area city.

The player drives a selectable car starting at the center of the city. The default vehicle is the blue “Aster Sedan,” with other selectable vehicles named “Vela Sport,” “Kite Hatch,” and “Morrow Cargo.” Show the actual 3D vehicle and keep it aligned with the driving direction. Give the vehicles different handling stats: the sport car accelerates and tops out fastest, the truck is slowest with weaker grip, and the hatchback is intermediate. Cars should have acceleration, top speed, grip, forward/reverse movement, steering, braking/handbrake, fuel consumption, and a small amount of wear while driving. Controls: W/S or Up/Down for throttle and reverse, A/D or Left/Right to steer, Space for handbrake/braking, F for cycling cameras, H for horn, E for opening the garage, and Escape for pause. On mobile, provide touch buttons for throttle, reverse, steering, brake, horn, and camera.

The main objective is a repeatable city delivery/run mission. Place a glowing gold torus beacon on the road area at an initial position around (74, 74). The objective is to drive to the beacon; reaching within roughly 6 meters completes the run, awards $450, restores 20 fuel up to the 100 maximum, displays a toast such as “Mission complete +$450 · New route set,” saves progress, and relocates the beacon to a new random point in the city for the next route. The mission panel should show “CITY RUN,” explain the gold-beacon objective, and after play begins show the approximate remaining distance in meters.

Add lightweight moving traffic: around 18 other cars, chosen from the sport, hatchback, and truck types, traveling continuously along the main horizontal and vertical roads. They should wrap around when they reach the city edges. Do not require complex traffic AI or collision gameplay; the visible traffic is ambient moving city traffic.

Implement persistent progression using local storage or an equivalent save system. Start with 
200, 100 health, 100 fuel, the Aster Sedan selected, no engine upgrade, clear weather, and daytime. The garage/control-room overlay should let the player choose among the four rides, repair the vehicle for 
80 to restore health, or buy an engine upgrade for $700. The upgrade should improve acceleration by 12% per level and top speed by 8% per level. Vehicles after the current selection can be selected only when the player has at least $600, with no separate purchase price deducted, matching the simple unlock behavior. Show small toast notifications for vehicle changes, repairs, upgrades, weather changes, and camera changes.

Include three camera modes cycled by F or the CAM button: a smooth chase camera behind and above the car, a close cockpit/near-car view, and a rear-facing camera looking forward from behind the vehicle. Use smooth camera interpolation and have each mode look toward the car’s travel direction. Add a WEATHER button cycling through Clear weather, Rainfall/wet-street mode, and Fog bank. Change the sky/fog colors and lighting for these modes; clear daytime should be bright, rainfall darker blue-gray, and fog subdued gray-blue. Preserve the displayed state label such as “Clear skies · Day,” “Rainfall · Day,” or “Fog bank · Day.” The existing implementation also supports a night/day state in its saved data, so the weather/lighting system may support a day/night toggle, but do not add a prominent control unless needed.

Build the HUD as fixed, dark translucent glass-like rounded panels over the 3D scene, matching the supplied visual style. At top left show the cyan, letter-spaced title “ULTIMATE CITY DRIVER.” At top right show money and the selected car, initially “
200 · Aster Sedan,” with a cyan health bar beneath. At upper left below the title show the mission card with gold “CITY RUN,” objective text, and weather/time status. At upper right show rounded GARAGE, WEATHER, and CAM buttons. At bottom right show a large digital speed readout in KM/H, the current gear (P when stopped, D moving forward, R reversing), and a cyan fuel bar labeled FUEL. At bottom left show the compact keyboard legend: “W/S throttle · A/D steer · Space handbrake · F camera · H horn · E garage · M map · Esc pause.” The M/map hint may be displayed as a legend item, but do not invent a map screen if it is not implemented. Centered temporary toast messages should fade in and out. On small screens, reposition the controls and show touch driving buttons.

Use physically lit simple geometry with shadows, fog, restrained neon-cyan HUD accents, gold mission beacon, and a dark navy page background. Ensure the game starts directly in the driving scene, displays the car and city even if external vehicle assets have not loaded by providing simple fallback car geometry, and automatically saves money, car, health, fuel, weather, and upgrade progress.