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 platformer titled “Skyline Sprint.” Use a dark navy atmospheric sky/void background with matching fog, soft shadows, bright cool cyan-blue lighting, and a clean neon sci-fi arcade presentation. The camera should follow a humanoid player from behind at a moderate distance, with mouse/touch dragging to look around. Load or provide a simple animated humanoid character with idle, walk/run, and jump/fall animation states; the player starts on a large blue rectangular platform at approximately (x=0, y=0.25, z=8).

Build a vertical obstacle course of raised rectangular platforms over an empty void, progressing generally forward toward increasingly negative z and upward in y. Platforms have dark blue/teal sides, cyan glowing trim along their top edges, cast/receive shadows, and should use these approximate placements and sizes: starting platform (0, 0.25, 8), width 7/depth 6; (-4, 2.3, 2), width 4/depth 3; (2, 4.5, -2), width 4/depth 3 and oscillating horizontally on the x axis over a range of 4; (-4, 6.7, -7), width 4/depth 3 and oscillating along z over a range of 3; (2, 9, -11), width 4/depth 3; (7, 11.5, -15), width 4/depth 3 and oscillating horizontally over a range of 4; (2, 14, -19), width 4/depth 3; and a final goal platform (-3, 17, -24), width 6/depth 4. Make the moving platforms smoothly oscillate, with the first x mover and z mover slower than the later x mover. The player must jump between platforms; falling below the course resets the player to the start and costs 3 seconds.

Place a gold/orange finish beacon on the final platform at (-3, 20, -24): a tall glowing tapered/cylindrical pillar with a rotating glowing octahedral core above it, gently bobbing vertically. Reaching the beacon area while the player is above y=15 completes the course. Add decorative floating depth markers: approximately 18 thin, semi-transparent blue/teal torus rings staggered into the distance and upward, plus a low dark circular void floor far below and distant dark blue pillar silhouettes for depth. Do not add enemies, collectibles, weapons, or other gameplay systems.

Use third-person movement with WASD or arrow keys, Space to jump, and Shift to run faster. Support mouse drag/touch drag for camera looking and the available mobile movement controls. Start a 75.0-second countdown when the run begins. The timer continuously decreases while active; if it reaches zero, stop movement and show a centered result panel saying “Time’s up” with explanatory text and a Restart run button. On reaching the beacon, stop the game and show “Course cleared!” with the remaining time to one decimal place and a Restart run button. Restart returns the player to the starting position, resets the timer to 75 seconds, and hides the result panel.

Overlay a fixed HUD on top of the 3D scene. At the top center, show three rounded translucent dark panels with thin blue borders: the uppercase spaced title “SKYLINE SPRINT,” a large white one-decimal timer, and a narrow horizontal progress bar. Fill the progress bar from cyan to pale green based on forward course progress from the starting z position toward the goal. At the bottom center show the instruction text “WASD / arrows to move · Space to jump · Shift to run · drag to look” in a rounded translucent panel. Keep the visual style restrained and high contrast: navy background, cyan trim and UI accents, white text, gold/orange beacon, subtle bloom/emissive materials, fog, and polished shadows.