Turbo Circuit

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-based 3D arcade motorcycle racing game titled "Turbo Circuit". Use a dark, cinematic Three.js presentation with a deep navy background and fog, a large flat green-black grass field, and an oval/circular asphalt race track made from a broad dark gray ring. Put thin yellow/gold boundary lines along both the inner and outer edges of the road, plus evenly spaced short white lane-marker dashes around the track. Surround the outside with repeated red racing barrier walls, and place two tall red banner towers near the start/finish line at the front of the oval, with a billboard prop on the left side. Use directional and hemisphere lighting, shadows, and a slightly glossy low-poly aesthetic.

The player is a small stylized red superbike centered on the track. Model it from simple geometric parts: a red rectangular body, pointed/cylindrical red nose, dark seat and dark rider, two dark wheels, and a bright cyan headlight. Start it at the front/bottom of the oval, facing around the course. Use a third-person chase camera positioned several units behind and above the bike, smoothly following it and looking toward the rider; the camera should show the oval track curving ahead and the surrounding props.

Gameplay is a time-trial circuit. Begin with a full-screen translucent dark overlay and centered rounded dark card. The card says "SUPERBIKE", explains in Spanish that the goal is to master the curves, use turbo, and complete three laps without leaving the asphalt, and has a bright pink-red "ARRANCAR" button plus a small web-game/touch-controls note. Once started, remove the overlay and run the timer. The goal is three laps; on completion show a centered finish overlay with "¡META!", the elapsed time in seconds, and an "OTRA CARRERA" restart button.

Implement the actual simple movement model: W or Up accelerates, S or Down brakes, A or Left steers left, and D or Right steers right. Shift activates turbo only while accelerating and while nitro remains; turbo accelerates more strongly and raises the speed cap. The bike's displayed speed is in km/h and is derived from the internal speed value. Nitro starts at 100, drains while turbo is held, and slowly regenerates whenever turbo is not active. Steering changes the bike's angular position around the oval; use the current speed to make steering responsive, and slightly vary the radius with a sine wave so the bike subtly shifts toward/away from the centerline while remaining on the road. Rotate the bike to follow the oval and lean/offset it slightly according to steering. The race should require advancing through three circuits before showing the finish state. Include touch controls for mobile: left and right arrow buttons on the lower left, and brake/down, gas/up, and lightning turbo buttons on the lower right. Buttons should support press-and-hold and have rounded translucent navy styling with a pink active state.

HUD styling: fixed overlay with white text and a red/pink uppercase "TURBO CIRCUIT" brand at top left, "VUELTA 1/3" (updating through the race) beneath it, and a centered small translucent hint reading "WASD / flechas para conducir · Shift turbo · móvil: botones". At top right show two dark rounded metric pills: "VELOCIDAD" with a large numeric value and "km/h", and "TIEMPO" with a large one-decimal timer and a horizontal nitro bar beneath it. Make the nitro bar a cyan-to-pink/red gradient whose width represents the remaining nitro. Keep the overall visual language dark navy, white, cyan, and hot pink/red, with rounded panels and strong shadows. Ensure the canvas fills the viewport and the game works with keyboard, touch, and a restart flow.