Add multi-pellet power-up system and GitHub Pages support

[Copilot]

Implements a 4-pellet power-up system (2 blue +1 length, 1 green +5 length, 1 red instant-death), removes server-dependent leaderboard for GitHub Pages deployment, and adds fork attribution.

Game Mechanics

• Multi-pellet array: Single pellet → 4 typed pellets with RGB colors
• Blue orbs (2): Standard +1 length/score, respawn on collection
• Green orb (1): +5 length/score, respawns on collection
• Red orb (1): Instant death, relocates every 3rd orb collected

pellets = [
    { type: 'blue', value: 1, color: { r: 0, g: 0, b: 255 }, ... },
    { type: 'blue', value: 1, color: { r: 0, g: 0, b: 255 }, ... },
    { type: 'green', value: 5, color: { r: 0, g: 255, b: 0 }, ... },
    { type: 'red', value: -1, color: { r: 255, g: 0, b: 0 }, ... }
];

Collision detection handles type-specific behaviors with orb counter for red pellet movement logic.

Static Hosting

Removed all server dependencies for GitHub Pages compatibility:

• Stripped leaderboard.js, reCaptcha, Google Analytics
• Removed PHP-dependent submission endpoints
• Verified relative asset paths

Attribution

Added fork notices linking to kevinAlbs/SphericalSnake in both UI and README with GitHub Pages deployment instructions.

Screenshots

All pellet types visible:

Gameplay showing orb positions:

Original prompt

Update the game so that it creates multiple power ups at a time (four). One of them should be green, worth five length, and one should be red, which instant death. Hitting a green or blue one respawns that color somewhere else, and every third orb you get moves the red orb.

Update the code so that it can run on a GitHub Pages url, and include the instructions needed to host it from this repo on a pages url.

If that requires removal of the leader board, do so.

Update the Readme and the page itself to indicate that this is a fork of the original, and link to the original.

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