High-Octane Horizon

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 browser-playable 3D arcade racing game titled “High-Octane Horizon.” Use Three.js-style rendering with a third-person chase camera positioned behind and slightly above the player car, smoothly following its heading and looking a few meters ahead. The main race takes place on a closed, looping asphalt circuit floating on a bright tropical island/ocean setting at sunset. Build the track from a winding Catmull-Rom-like loop with several tight bends and bridges between roughly circular sandy island sections. The road is about 15–16 units wide, dark charcoal asphalt with glossy/metallic highlights, bordered by broad orange/yellow and dark red curb ribbons, colored cyan/yellow lane dashes, and continuous low gray safety walls with glowing orange top trim. Surround it with turquoise water, white shore foam, sandy island discs, beach haze, a blue-to-peach gradient sky, a large pale sun, drifting white clouds with cloud shadows, palm trees around the outside, stadium stands, banners, and a colorful low-poly cheering crowd. Add a finish gate and white start/finish line. The visual style should be polished, colorful, low-poly/toy-like sci-fi arcade racing with strong sunset lighting, shadows, fog, bloom-like emissive colors, and reflective materials.

The player drives a compact toy-like futuristic racer, with five similar AI rival cars on the grid. Use loaded or equivalent low-poly racer models, visible rear booster flames, and simple collision volumes. Place six cars on a starting grid near the finish line. Start each race with a large center-screen 3, 2, 1, GO countdown; support an optional jump start if the player accelerates during the countdown. The race is three laps, and the player competes for position against rivals named Riptide, Blaze, Mira, Nova, and Ash. AI cars follow the circuit at differing speeds and lanes, occasionally boosting, and can be temporarily stunned by attacks or power-ups.

Driving controls: WASD or arrow keys drive; W/up accelerates, S/down brakes/reverses, and A/D or left/right steer. Space (or Shift) activates nitro while moving and consumes a visible nitro meter that recharges when not boosting. Cap the normal speed around 27 internal units and allow higher speed during abilities/boosts. Steering should become more responsive with speed, with reverse steering behavior when backing up. Slow the car dramatically when it leaves the track and bounce it backward when it collides with walls, rivals, or solid stands/objects. Include gear display 1–6 based on speed. Add drift scoring: turning at speed while misaligned from the track direction creates a drift, increasing a combo and adding to a drift score; Mira’s active ability doubles drift scoring.

Add three selectable driver cards in the adventure UI: Rex Vandal, Mira Quill, and Nova Pike. The E key or an on-screen ability button activates the selected driver’s ability with a cooldown: Rex gets temporary higher top speed/Overdrive, Mira gets a temporary drift bonus, and Nova gets temporary crash resistance. Show ability state and cooldown in the HUD. Add Q for a rocket attack that targets a nearby/ahead rival and stuns it briefly, and F for chain lightning that briefly stuns all rivals; provide matching touch buttons on mobile. Place twelve floating, rotating glowing octahedral power-ups around the circuit, alternating sides of the road and using cyan, yellow, pink, and purple materials. Their types are Rocket Boost (instant speed and refill nitro), Chain Lightning (stun all rivals), Shield Bubble (temporary collision protection), and Warp Jump (teleport the player forward along the track); power-ups respawn after a delay. Show the current power-up and attack status.

HUD during the race: upper-left leaderboard titled “ISLAND RACE · LIVE” with six ranked rows, colored swatches, and YOU highlighted; upper-right circular speedometer with a large gear number, KM/H speed value, and colored arc; also show race information including “LAP 1 / 3,” position out of 6, elapsed time, drift score/combo, three sector times, driver ability state, and power-up/attack state. Include a vertical nitro bar with cyan-purple-yellow gradient, a large center status label such as NITRO READY, DRIFTING, IMPACT!, or JUMP START!, a minimap panel showing the full loop as a thick multicolor route with the player as a cyan dot, rivals as red dots, and the start line, plus a bottom hint reading “WASD / ARROWS drive · SPACE nitro · E ability · Q/F attacks · R restart · M map.” On touch/mobile, show circular left/right, brake, nitro, ability, rocket, and lightning buttons along the bottom edges.

When the player completes lap three, stop the car, award 350 coins once, and show a centered finish banner reading “HORIZON CHAMPION” with the finish time and “Press R to race again.” R resets the countdown, cars, timers, lap, nitro, score, and power-up states.

Include a full-screen pre-race lobby over the scene with “HIGH-OCTANE HORIZON” and “ISLAND RACING LEAGUE,” a sunset showroom-style background, selected car name/badge and stats, coin/trophy/battery pills, navigation tabs, a GARAGE button, and a bright RACE button. The garage should persist coins, owned car IDs, and selected car in local storage; show Beach Runner starter plus purchasable catalog entries Sandstorm GT, Island X, Volcano R, Skyline GT, and Luxe Cruiser with the prices and class descriptions shown in the UI. Include an “ADVENTURE MAP” overlay opened by the map button or M key, with selectable world cards Volcanic Run, Pyramid Rush, Dragon Keep, Wreckwater, and Bio Lab, locked labels/lore text, a power-up deck count, and the three driver cards. Keep this map primarily as a front-end overlay; the actual playable circuit remains the tropical island race described above.