901 Islands

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 first-person 3D parkour game titled "901 Islands". Use a dark navy sky/background with atmospheric fog, a cinematic low-poly floating-island style, and a first-person camera with a small glowing white/cyan crosshair at screen center. The player starts on the first island at approximately (0, 6.2, 2.2), looking along a forward route through the sky. Provide FPS controls: WASD or arrow keys to move, Space to jump, Shift to sprint, and mouse/touch dragging to look; on mobile show a virtual joystick and jump control through the touch control system. Clicking the start button should begin the run and hide the intro overlay; support Enter as an alternative start key. Use simple collision-based platforming with gravity, jumping, slope handling, and respawn when the player falls below the world.

Build exactly nine elevated islands arranged as a staggered route receding forward along negative Z, with these center positions and radii: island 1 (0,5,0), radius 5.2; island 2 (0,6,-13), radius 4.2; island 3 (7,8,-25), radius 3.9; island 4 (-2,10,-37), radius 4.4; island 5 (-12,12,-48), radius 3.8; island 6 (-2,14,-60), radius 4.5; island 7 (10,16,-71), radius 3.7; island 8 (4,18,-83), radius 4.5; island 9 (-7,20,-95), radius 5.2. Each island is a low-poly, pale green/teal octagonal cylindrical top with a narrower dark blue-gray conical rocky underside hanging below it. Add a thin luminous mint-green ring around the island rim, a bright cyan glowing beacon/pillar rising from its center, and a small dark rectangular launch pad near the front side (positive Z) of each island. Use soft warm directional sunlight, cool blue rim lighting, and cool sky illumination so the platforms are readable against the deep blue-black sky. Add sparse low-poly nature decoration: cone-shaped trees on every other island (islands 1, 3, 5, 7, 9) near the edge and bushes on islands except 2, 5, and 8, matching a simple stylized nature-kit appearance.

Place eight small dark blue-gray square stepping stones between the main islands to make the early jumps readable but still challenging. Their centers should be approximately: (0,5.6,-6.5) size 1.6; (3.2,6.8,-19.2) size 1.35; (2.5,9.1,-31.2) size 1.25; (-7.6,11.2,-43.2) size 1.4; (-7,13.4,-54.4) size 1.3; (6.2,15.2,-66.2) size 1.2; (8.8,17.2,-77.2) size 1.35; and (-1.2,19.2,-89) size 1.5. Make them slightly rotated and collidable.

The goal is to travel from island 1 to island 9 by landing on the platforms and progressing forward. Track the highest island reached: when the player is within roughly 72% of a target island radius and above its surface, mark that island as reached and slightly enlarge its beacon vertically. Once island 9 is reached, show a centered dark translucent victory overlay titled "SKYLINE CLEARED" with text reporting the completion time, such as "You crossed all 9 islands in 0:XX." and a rounded "RUN IT AGAIN" button that resets the player to the first island and starts a new timed run. If the player falls below y=-12, respawn them at the current highest island, just above its surface and near its launch pad.

Add a fixed HUD over the game. At top-left show uppercase spaced white text "901 ISLANDS". At top-right show "ISLAND 1 / 9" and below it "TIME 0:00", with the current island and elapsed timer values in bright cyan. Keep the timer running during an active run and format it as minutes and two-digit seconds. Put the glowing crosshair at screen center. At the bottom center show a translucent dark rounded instruction panel with a thin subtle border: "WASD / arrows move · Space jump · Shift sprint · drag to look" and a smaller second line "On mobile: use the joystick and jump button".

Before play, show a full-screen dark radial-gradient intro overlay with a centered rounded dark card, cyan border glow, and large spaced title "901", explanatory text "Cross the sky one floating island at a time. Land cleanly, find the next beacon, and keep moving.", and a bright cyan pill-shaped "ENTER THE SKY" button. Match the screenshot's visual language: almost-black navy background, sparse silhouetted islands in the distance, white bold sans-serif UI, cyan highlights, subtle shadows/glows, and restrained low-poly geometry. Include a jump sound effect when Space is pressed, but do not add enemies, weapons, collectibles, health, lives, or other mechanics not specified here.