Skyline Sprint

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 third-person platforming game titled “Skyline Sprint.” Use a dark navy nighttime-style scene with fog, soft shadows, and a clean low-poly/modern sci-fi look. The camera should be a perspective third-person camera following a small humanoid player from behind and above, with the player centered as they navigate an elevated obstacle course.

The level begins on a large square teal-blue starting platform (about 8x8 units) at ground level, with a thin glowing cyan edge trim. Ahead is a rising sequence of four separate rectangular teal platforms, each with a thin bright cyan border, suspended in space and arranged as a parkour route toward the goal: platform 1 around x=7, y=1.8, z=-3 (4x3), platform 2 around x=12, y=4, z=1 (3.5x3), platform 3 around x=7, y=6.2, z=6 (3.5x3), and platform 4 around x=0, y=8.4, z=2 (4.2x3). Make the four platforms continuously slide back and forth on alternating axes: platform 1 along X, platform 2 along Z, platform 3 along X, and platform 4 along Z, with smooth sinusoidal movement and visibly different amplitudes/speeds. Put the finish on the upper final platform at approximately x=-1.1, y=8.95, z=2: a gold beacon made from a short tapered/cylindrical pillar with a glowing gold torus ring above it. Animate the ring rotating.

The controllable avatar is a simple rounded capsule-like humanoid, coral/red-pink with a subtle dark red emissive tint, and a small gold rectangular visor on its front. Start it at the center of the starting platform, slightly above the surface. Implement responsive third-person movement: WASD or arrow keys move, Space jumps, and Shift makes the character run faster. Use gravity and jumping strong enough to leap between the raised moving platforms. Falling below the course should reset the player to the starting area and subtract 2 seconds from the remaining time.

Make the objective and rules explicit: the player has 30 seconds to reach the gold beacon. Start with a centered modal overlay that dims the game and says “Skyline Sprint” and “Cross the moving platforms before the clock hits zero.” Include a bright cyan “Start run” button. Clicking it resets the player, timer, and run state and hides the modal. While playing, show a fixed HUD: top-left dark translucent bordered panel with the uppercase title “SKYLINE SPRINT” and status “Reach the gold beacon”; top-right matching panel labeled “TIME” with a large cyan timer counting down from 30.0 to one decimal place. At the bottom center, show the instruction strip “WASD / arrows to move · Space to jump · Shift to run.”

When the player comes within roughly 1.5 units of the beacon, end the run successfully, stop the timer and movement, show the overlay again with title “Beacon reached!”, text such as “You finished with X.X seconds left.”, change the button to “Run again,” and change the HUD status to “Course complete.” If the timer reaches zero first, show “Time up,” text “The platforms kept moving. Try a faster route.”, change the button to “Run again,” and set the HUD status to “Run expired.” The timer must never display below 0.0. Keep the overlay, HUD, and bottom hint styled with dark translucent blue panels, subtle pale-blue borders, cyan accents, white/light-blue text, and a bright cyan action button. Use responsive sizing for smaller screens, preserve the full-screen canvas, dark #09111f-like background, fog, directional lighting, hemisphere fill light, and shadow casting for the platforms and character.