Monster Hop

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 side-view 3D platformer called "Monster Hop" where players switch between four creatures with unique abilities to navigate obstacle courses and reach the finish line.

**Camera & Perspective**: Side-view 3D perspective with a dynamic camera that follows the player horizontally and vertically, staying slightly ahead and above. The camera smoothly lerps to track player movement with constraints per level.

**Player Avatar**: Four switchable creature characters:
1. Alien (purple/dark blob with antenna) - can wall-jump on blue walls to climb vertical surfaces
2. Bee (yellow/black striped with wings) - has one double-jump in mid-air
3. Cactus (green with spikes/arms) - performs a long horizontal ground dash with low gravity
4. Ghost (white/translucent floating) - phases through purple gates, hovers with gentle bobbing animation

Each creature uses 3D models with walk, idle, and jump animations. They cast shadows and face left/right based on movement direction.

**Core Mechanic & Goal**: Switch between creatures mid-level using number keys 1-4 or on-screen buttons. Use each creature's ability to overcome color-coded obstacles. Collect gems (cyan octahedron crystals that rotate and float) to earn up to 3 stars (4 gems = 1★, 8 gems = 2★, 12 gems = 3★). Reach the checkered finish line flag and touch the ground inside the finish zone to complete the level. Victory triggers confetti particles and a fanfare, then shows star rating.

**Controls**: 
- WASD or Arrow keys to move/jump (Space also jumps)
- Number keys 1-4 to switch creatures, or Q/E to cycle through them
- Shift or F for Cactus dash ability
- Mobile: Left/right directional buttons, jump button, skill button, and creature-switch buttons at bottom
- Restart button resets current run; Levels button returns to level select

**Obstacles & Enemies**:
- Blue vertical walls: Only Alien can wall-jump to climb these
- Yellow platforms with larger gaps: Require Bee's double-jump to cross
- Long horizontal gaps: Require Cactus's fast ground dash
- Purple translucent gates: Only Ghost can phase through
- Red "Cyclops" patrol enemies (red spherical monsters) that walk back and forth - touching them respawns player at start
- Spike traps (gray bases with metallic spikes) that kill on contact
- Fragile platforms (red with light blue underside) that crumble after standing on them for ~1 second, then regenerate after ~2 seconds
- Hopping enemies (bounce vertically while patrolling) in later levels
- Falling below the level respawns the player

**On-Screen HUD**: 
- Top-left: "Gems X/Y" counter with star rating display (★★★ or ☆☆☆)
- Top-center left: Current creature icon and name badge
- Top-center: Movement controls reminder ("WASD/Arrows move • Space jumps")
- Top-center right: Current creature's ability description
- Top-right: Restart button
- Bottom of screen: Four creature-switch buttons showing emoji icons (👽🐝🌵👻)
- Level Select button in top navigation
- Music On/Off toggle button
- Temporary centered messages for hints and ability usage

**Four Levels**:
1. Tutorial: Introduces each creature's ability with labeled obstacles, 12 gems
2. Gauntlet: Harder challenges requiring all abilities without tutorial labels, 12 gems
3. Sky Tower: Vertical climbing level, zigzag upward through stacked platforms to finish at top, 12 gems
4. Storm Spire: Hardest level with fragile platforms, spike traps, and hopping enemies, 12 gems

**Setting**: Bright outdoor sky environment with gradient blue sky background, white puffy clouds (made of spheres), distant green ridges, decorative conifer trees in background, sun orb visible, soft fog in distance. Platforms are rounded 3D boxes in green (standard), blue (Alien walls), yellow (Bee platforms), brown (Cactus dash sections), and purple (Ghost gates). Each platform has a grass-colored lip on top. Finish line has checkered flag pattern, gold cap on pole, and gold ground stripe.

**Art Style**: Low-poly 3D with smooth shading, cute creature designs, colorful palette, soft shadows, ambient occlusion. Gems have emissive glow. Ghost is semi-transparent with gentle floating animation. All creatures and objects cast real-time shadows on platforms. Victory confetti uses small colored cubes that tumble and fall.

**Additional Details**: 
- Title screen with "Start Game" button leading to 4-level select screen
- Level select shows best star rating per level (persisted in localStorage)
- Character select screen before each level to choose starting creature
- Level complete screen shows final stars and gem count
- Solid rectangular collision on all sides of platforms prevents clipping
- Procedural background music loop (can be toggled) plays during gameplay
- Jump/dash sound effects when abilities activate
- Temporary messages guide player ("Alien wall climb!", "Bee double jump!", etc.)
- Falling respawns player at level start with message "Careful — you fell!"