Gravefire Arena

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.

Recreate “Gravefire Arena” as a browser-playable third-person dark-fantasy survival arena. Use a full-screen Three.js-style 3D scene with a very dark purple/black background, exponential atmospheric fog, soft shadows, ACES-like cinematic tone mapping, and neon magical lighting: a lavender/blue light toward the rear of the arena and a pink/orange ember light near the front. The camera is a 62-degree perspective third-person camera following the player from about 7 units behind, with mouse look and a small centered lavender crosshair. The player is a simple stylized mage made from primitives: a dark purple capsule-like cloak/body, pale pinkish spherical head, brown staff, and a glowing hot-pink orb at the staff tip. WASD moves, mouse aims/looks, Space jumps, left click casts the active spell, and Q (or the visible “SWITCH SPELL [Q]” button) cycles through owned spells.

Build a circular ruined arena: a broad dark stone cylinder/floor about 24–26 units in radius, with ten concentric glowing purple rune rings on the ground. Surround it with blocky ruined stone obstacles/walls, including rectangular blocks at approximately (-10,-5), (9,-7), (-8,8), (11,7), long blocks at the north and south edges, and tall side blocks; add damaged fantasy columns, walls, and two stair props around the perimeter/interior. Keep the geometry stylized and sparse, with dark gray-purple materials, emissive violet rune circles, and shadows.

The goal is to survive five-minute rounds and defeat the approaching undead enemies. Enemies spawn around the outer edge and path directly toward the player, attack at close range, and can be pushed apart when crowding. The regular enemy is a small gray-blue rounded creature with a glowing red eye, 5 HP, 10 contact damage, and speed 2.15; regular enemies periodically heal. Rare variants include small green “baby” enemies with 2 HP, 20 damage, and speed 4.2, and orange/brown “rider” enemies with 10 HP, 30 damage, and speed 4.5. A normal round targets roughly 8 plus 1.4 times the round number enemies, with spawn frequency increasing as rounds advance. When the player reaches zero HP, end the run, clear enemies, and return to the menu with the button labeled “RESTART RUN.”

Every tenth round is a boss round instead of a timed normal round: spawn one large magenta/purple rounded boss with 300 HP, 30 contact damage, and speed 1.5. Show a centered boss HUD bar while it exists; the boss round ends when the boss dies. Normal rounds end when their 300-second timer reaches zero. At the end of any round, restore the player to max HP, pause the action, and show a centered upgrade selection overlay. Offer new spells while fewer than eight are owned, plus upgrade choices; selecting a new spell adds it to the spellbook, while selecting an upgrade multiplies all spell power by 1.1 (+10%). Advance to the next round after the choice.

Implement the eight spells and their exact visible gameplay roles: Fireball (FIRE, projectile, 16 damage, 2-second cooldown, orange-red glowing projectile); Ice Spikes (ICE, nova, 12 damage, 7-second cooldown, close area burst); Lightning Line (LIGHTNING, beam, 15 damage, 5-second cooldown, a short-lived lavender straight beam in the aim direction); Nature Roots (NATURE, root, 8 damage value, 5-second cooldown, roots enemies within 10 units for 3 seconds and emits green particles); Water Bomb (WATER, bomb, 20 damage, 5-second cooldown, slower blue projectile with impact area damage); Wind Burst (WIND, nova, 10 damage, 5-second cooldown); Earthquake (EARTH, quake, 30 damage, 18-second cooldown, very large radius-20 area attack); Shadow Orb (DARK, bomb, 24 damage, 6-second cooldown, dark violet explosive projectile). Projectiles travel in the horizontal camera-facing direction, burst into glowing particles on impact/expiration, and attacks should briefly shake the camera. The spellbook begins with Fireball only; Q cycles among owned spells.

Create a clean HUD over the game using translucent near-black purple panels with thin violet borders and subtle glow/blur. Top-left show “HP 100 / 100” and a red-to-orange health bar, “ROUND 1 · TIME 05:00,” and “Spellbook 1/8 · Power +0%.” Top-right show the active spell name (“Fireball”), element (“FIRE”), cooldown state (“READY” or remaining seconds), and a cooldown bar. For boss rounds, show a wide centered boss panel with boss name and a magenta/blue health bar. At bottom-right show the spell-switch button. At bottom-left show the small control hint: “WASD move · Mouse aim · Space jump · Left click cast · Q switch.”

Start with a full-screen dark translucent menu overlay containing a large centered glowing lavender title “GRAVEFIRE ARENA,” subtitle “A third-person dark-fantasy survival run. Hold the arena, build your spellbook, and outlast the dead.”, a prominent PLAY button, and the desktop control instructions. On PLAY, hide the menu and begin round 1. Use rounded panels, system sans-serif typography, lavender/pink text, purple gradients, and emissive particle bursts to match the neon gothic fantasy presentation shown in the reference.