The Grimberg Mystery

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 exploration adventure titled “The Grimberg Mystery,” with one playable level labeled “Nivel 1 · El Bosque Encantado.” Use Three.js or an equivalent real-time 3D engine, with a dark magical forest viewed through a perspective camera that follows the player from behind at roughly 5 units away. The environment should be a 100-by-100 forest floor under a deep blue night background with exponential blue fog, cool cyan ambient lighting, a strong pale directional light, and a subtle purple point light. Use soft shadows, cinematic tone mapping, and a moody fantasy palette.

The player is Dr. Grimberg, a stylized friendly low-poly/cartoon character built from simple geometry: a large round cream shirt belly, brown pants, black shoes, a peach face and hands, a thick black beard, round nose, small dark eyes, and curly black hair made from several rounded forms. Place him at the starting clearing around position (4, 0, 20). He should move with WASD or arrow keys, run while holding Shift, jump with Space, rotate to face his movement direction, and be controlled with mouse camera movement. Animate his legs with a simple alternating swing while walking or running. Movement should use gravity, jumping, and ground collision; decorative objects do not need collision.

Build the forest with a green ground plane, a glowing translucent cyan river running roughly from north to south around x=-8, a cyan waterfall and pool at the far end, river stones, and a winding brown stepping/path route. Add a small wooden bridge across the river near z=4, including planks and two rails. Populate the scene with stylized trees (use free low-poly tree assets if available, with simple fallback trees consisting of brown trunks and rounded green crowns), mushrooms, rocks including a few floating rocks, and scattered glowing cyan and purple flowers. Add many tiny floating mint magical particles throughout the air. In the distance at z=-46, construct a dark castle silhouette from a broad wall, two cylindrical towers with conical roofs, a dark gate, several glowing gold windows, and suspended bridge sections. It should be visible through the fog but not immediately accessible.

The level’s main interactable route is a three-step investigation. First, put a floating gold octahedron “AncientArtifact” on an ancient stone altar/ruin around (9, 0.9, -9). Surround it with blocky ancient stones, a tall glowing cyan rune pillar, and a line of six small carved glowing rune rings. When Dr. Grimberg comes within about 3 units, show an interaction prompt reading “Recoger el artefacto antiguo [E]”; pressing E hides the artifact, adds “Fragmento de conciencia” to the inventory, marks the artifact recovered, and displays a toast: “El artefacto vibra: “Grimberg estuvo aquí…””.

After collecting the artifact, allow interaction with the stone mechanism/altar at the same ruin. Show “Activar el mecanismo de piedra [E]” within range. Pressing E marks the mechanism active, makes a previously hidden purple glowing torus portal appear above the altar, animates it rotating and growing from small to full size, and displays “El mecanismo despierta y abre un portal oculto.” Once the mechanism is active, a glowing cyan checkpoint/rune marker at approximately (-1, 1, 14) becomes relevant. Near it, show “Investigar las runas [E]”; pressing E marks the only secret/checkpoint found and displays “Checkpoint descubierto. El camino al castillo aparece entre la niebla.” Also, after the mechanism is active, if the player reaches the distant castle area (z < -38), show the message “Las puertas del castillo siguen cerradas… por ahora” rather than opening it.

Provide a fixed HUD in Spanish over the gameplay. At top left show “THE GRIMBERG MYSTERY” in pale mint, with a dark translucent mission panel beneath it. The panel should list “Objetivo” and three checkbox-style objectives: “Explora y encuentra el artefacto antiguo” (then “✓ Artefacto recuperado”), “Activa el mecanismo de piedra” (then “✓ Portal activado”), and “Descubre el claro y sigue las runas” (then “✓ Camino hacia el castillo descubierto”). At top right show “Inventario: 0 · Secretos: 0 / 1,” updating as appropriate. When close enough to an interactable, display a centered dark prompt near the bottom with a thin cyan border. Display centered dark translucent toast notifications for interactions. At bottom left show the control guide: “WASD / flechas mover · Shift correr · Espacio saltar · ratón cámara · E interactuar · Esc pausa”.

Include a Spanish-language title menu before play with a radial dark navy-to-teal background, large centered mint title “The Grimberg Mystery,” subtitle “Nivel 1 · El Bosque Encantado,” a bordered button “Nueva partida,” and the small note “Recursos gratuitos · Sin funciones de pago activadas.” Starting the button hides the menu, begins the level, starts quiet looping atmospheric background music if permitted, and shows a toast such as “Grimberg despierta en el claro. Busca las runas azules.” Pressing Escape during play opens a full-screen dark translucent pause overlay titled “Pausa” with “Continuar” and “Reiniciar nivel” buttons. Restarting resets the player to the starting clearing and resets artifact, portal, checkpoint, inventory, and mission state. Keep the presentation atmospheric, low-poly, mysterious, and exploration-focused; do not add combat, enemies, health, weapons, payment features, or extra levels because they are not part of this game.