Brainrot Cruise

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 browser-based 3D arcade driving game titled “Brainrot Cruise.” Use Three.js with a third-person chase camera behind and above the player car, looking forward over a compact low-poly city. The scene should have a vivid stylized sky/background with purple-to-cyan-to-green gradient-like colors, soft fog, bright ambient and directional lighting, and soft shadows. Cover the ground with a large green grass plane. Build a simple square road network from dark charcoal asphalt slabs with pale raised shoulders and short yellow lane markings: a wide north-south road and east-west road through the center, plus narrower parallel avenues around the west/east and north/south edges. Add a light circular central plaza, low-poly suburban/commercial buildings around the roads, rows of simple stylized trees around the outskirts and inner blocks, road cones, and street lamps with warm point lights. Keep the art clean, colorful, toy-like, and low-poly rather than realistic.

The player starts near the south side of the central intersection in a starter red placeholder coupe (or load a low-poly sports sedan model when available). The car is a small boxy vehicle with a red body, pale blue translucent roof/windshield, and four black wheels. It must be controllable with keyboard and touch/mouse controls: Up/W or the large ▲ button accelerates, Down/S or ▼ brakes/reverses, Left/A or ◀ steers left, and Right/D or ▶ steers right. The car has acceleration, braking/coasting, forward and reverse speed limits, steering that becomes less responsive at high speed, and reduced grip and a lower maximum speed on grass. Keep the vehicle inside world boundaries and prevent it from driving through buildings, trees, and cones using simple collision boxes. The camera smoothly follows behind the car and aims ahead of it, lifting slightly at speed.

Make the main game loop an earning-and-delivery cruise. Driving distance increases as the car moves, and the player continuously earns “Braincells”/cash while moving, with a larger multiplier when maintaining speed on asphalt. The multiplier ranges from x1.0 to x4.0; grass does not build the road-speed bonus and should trigger a mission hint such as “The grass is anti-aura — stay on the road to keep the sigma bonus alive.” Display a persistent translucent dark HUD panel in the upper-left with the title, Braincells money, Aura distance in meters, Skibidi speed in km/h, Sigma multiplier, and Drops/delivery count. Begin at $0, 0 m, 0 km/h, x1.0, and 0 drops. Display a translucent instruction card in the upper-right telling the player to farm cash, dodge traffic, collect the green glow, and deliver it to the sigma pad.

Place multiple floating green cash stacks around the city, each made from a small bright green rectangular bundle with a pale band and a green glow/light. They bob and rotate. When the player drives within about 1.35 units, hide the stack, add $35 to money (one central/high-value stack gives $80), add it to bonus cash, and increase the multiplier by 0.15 up to x4.0. Respawn collected stacks after roughly 5.2 seconds. Show a mission/status pill centered near the bottom above the touch controls, with messages such as “Start driving and stack maximum sigma bonus,” “Cash stack grabbed — bonus now x…,” and collision/road guidance.

Add four glowing delivery depots at the corners of the city: dark green circular pads with bright green torus rings and a pulsing beacon. Only one depot is visible/active at a time, initially the southwest/northwest equivalent depot at approximately (-30, -30), with a 
20 base payout. Other depots should use base payouts of 
40, 
60, and 
80. The HUD mission tells the player to drive to the glowing depot for the payout multiplied by the current Sigma bonus. On reaching the active pad within about 2.1 units, award rounded payout = base payout × multiplier, add it to money and bonus cash, increment Drops, play a positive sound, show a completion message, and activate the next depot cyclically.

Populate six moving traffic vehicles, all visually based on a taxi model when external low-poly vehicle assets are available. They travel continuously along the main and side roads in both axes, loop at the road boundaries, and face their movement direction. If the player gets close enough to traffic, apply a crash: subtract $45 but never below zero, reset the multiplier to x1.0, briefly prevent repeated collisions, reverse/dampen speed, increment an internal crash count, play a harsh short sound, and show a message like “Bruh — traffic bonked you. Hold the line and rebuild your sigma chain.” Static collisions with scenery should similarly bounce/dampen the car and reduce the multiplier.

Include a garage/shop opened by the centered top button labeled “ROT SHOP / B” and by the B key. Opening it stops driving input and shows a centered translucent rounded “Brainrot Garage” panel with a close X and a scrollable list. Offer exactly these six vehicles with displayed top-speed and handling stats and the following prices: free Starter Coupe (top speed 140, handling 7/10), City Taxi (
60, sell 
70; 126, handling 6/10), Heavy SUV ($420, sell 
80; 118, handling 5/10), Street Hatch ($560, sell $380; 148, handling 8/10), Luxury Cruiser ($760, sell $520; 142, handling 7/10), and Rescue Van ($980, sell $690; 134, handling 6/10). The underlying handling should differ by vehicle: Street Hatch fastest and most responsive, Heavy SUV slowest/less nimble but stronger off-road speed, and Starter Coupe as the default. Each row needs category/name, stats, ownership/current status, DRIVE button for owned cars, and BUY or SELL button. Buying deducts money and owns/equips the vehicle; selling returns its specified sell price and falls back to the starter if selling the current car. Use Kenney-style car, city, tree, and cone GLB assets from the same kinds of external URLs when available, but retain the simple placeholder car and allow the game to remain playable if models fail to load.

Use translucent glassy rounded UI panels with pink/purple highlights, white text, yellow title accents, and bright blue/pink garage button styling. On mobile, place four large semi-transparent rounded touch buttons along the bottom: ◀ and ▶ on the lower left, ▼ and ▲ on the lower right. Keep controls responsive and prevent touch scrolling. Add lightweight Web Audio feedback: a bright chime for cash pickup and deliveries, a harsh descending tone for crashes, and a short shop tone after user interaction. Ensure the game remains playable even before optional external models finish loading.