Gem 11 - Merge Puzzle Game - Puzzle Game

Please use Three.js to generate a **mobile-first game** with the theme "**Gem 11 - Cosmic Crystal Merge**". Please read the following detailed game design requirements first, and then generate the code accordingly: ### 1. Assets & Environment * **Visual Style**: High-gloss, semi-realistic 3D crystals set against a clean, minimalist background. The style should feel premium and tactile, like polished glass or gemstones. * **Crystal Models**: Create procedurally generated low-poly meshes that look like raw cut gems. * **Levels**: Define 11 distinct tiers of gems. * Tier 1-3: Rough, dark stones (obsidian, dark grey, slate). * Tier 4-7: Vibrant, saturated colors (blue topaz, amethyst, emerald). * Tier 8-11: Glowing, radiant, multi-faceted gems (ruby, diamond, shifting prismatic textures). * **Materials**: Use `MeshPhysicalMaterial` with high transmission, clearcoat, and roughness set to near zero to simulate glass/gemstone refraction. * **Grid Board**: A clean 6x6 hexagonal or square grid (depending on typical hex-merge mechanics, let's go with a circular/hexagonal arrangement for visual flair) floating in void space. The board slots should be subtle recessed areas. * **Lighting**: Use a dramatic studio lighting setup. A strong rim light to catch the edges of the gems, plus an ambient soft light. * **Particles**: When gems merge, trigger a burst of small, glowing shards and a subtle shockwave distortion effect. * **Optimization**: Use `InstancedMesh` for rendering the gems to keep draw calls low on mobile devices. ### 2. Audio Requirements * **BGM**: A relaxing, ambient, "zen-like" electronic track. Think soft synthesizers, slow tempos, and a sense of cosmic mystery. It should be non-intrusive to aid concentration. * **SFX**: * **Placement**: A solid "clack" sound, like a stone hitting a wooden board. * **Merge**: A satisfying, glass-like chime or "ting" sound. The pitch should rise as the gem tier increases (Tier 1 is low pitch, Tier 11 is high pitch). * **Combo**: A rising arpeggio flourish if multiple merges happen in sequence. * **Game Over**: A low, resonant drone sound. ### 3. Gameplay Loop * **Core Mechanic**: This is a merge logic puzzle similar to "2048" but with a spatial twist. * The board starts with random low-tier gems. * **Input**: The player taps an empty spot on the grid to place a new gem (previewed in a "Next Piece" UI). * **Merging**: If the placed gem is adjacent (vertically or horizontally) to one or more gems of the *same type*, they merge into the placed spot, upgrading to the next tier (e.g., two Tier-1s become one Tier-2). * **Chain Reaction**: If the newly formed gem is now adjacent to other gems of its new tier, they also merge automatically. * **Goal**: Strategically place and merge gems to reach the elusive "Gem 11". * **Game Over**: The game ends when the grid is full and no moves are possible. * **Score**: Score is calculated based on the tier of gems merged. High-tier merges yield exponential points. ### 4. Mobile Controls & Interaction * **Orientation**: Portrait mode (Vertical) is mandatory for one-handed play. * **Controls**: * **Tap-to-Place**: The primary interaction is a simple tap on any empty grid cell. * **Preview UI**: Display the "Next Gem" clearly above the board so the player can plan. * **Hold-to-Preview**: (Optional) Touching and holding a cell shows a ghost outline of where the gem will land and highlights potential merge candidates. * **Haptic Feedback**: Trigger a light vibration (Taptic Engine) on every successful merge. A heavier vibration for high-tier merges (Tier 8+). * **UI Layout**: * Top: Current Score (large font), High Score (smaller), and "Next Gem" indicator. * Center: The 3D Game Board (ensure it doesn't clip off the edges on different aspect ratios). * Bottom: "Restart" button and "Settings" icon, placed well away from the active game grid to prevent accidental clicks. Buttons should be at least 48x48px for touch targets. Do not ask for clarification. Do not request confirmation. Directly execute the generation task based on the given instructions.