BOSS RUSH

Optimize the following for a mobile use (no lags). YOU MUST DEBUG THE WHOLE CODE FILE. Create a complete browser-based 3D boss-rush game using HTML, CSS, and JavaScript with Three.js from a CDN. Keep it self-contained and directly playable in a browser without any build step. 
 
The game should be a stylish third-person “souls-like” arena experience with: 
- player movement, sprint, dodge roll with i-frames, melee attack, third-person camera 
- health/stamina UI, boss name/health UI, death and victory screens, main menu 
- responsive menu layout that works on smaller screens and can scroll if needed 
- procedural audio using Web Audio API 
- strong visual presentation with emissive materials, particles, attack telegraphs, fog, lighting, and polished boss effects 
 
Build a circular arena with environmental detail, not just a flat floor. Include things like pillars, glowing runes, crystals, rim detail, lighting accents, and other atmospheric touches. The world should feel intentional and visually rich. 
 
Create 5 bosses, each with: 
- a distinct model/silhouette 
- unique theme and color identity 
- unique moves and attack patterns 
- readable telegraphs 
- different gameplay feel from the others 
 
Boss 1 through 4 should each feel original and varied. Include melee pressure, AoEs, movement attacks, projectiles, or other mechanics as appropriate, but avoid making them feel repetitive. 
 
Boss 5 should be the final boss and the most elaborate encounter: 
- it must have 2 phases 
- the second phase should be a rebirth/transformation, not just a recolor 
- the two phases should play differently 
- it should be only a little harder than the earlier bosses, not unfair 
- its model should be more detailed than the others 
- it should have the best effects and presentation in the game 
- it should interact with the world in some way 
- the world should visibly change during the phase transition 
 
For the final boss, make sure phase 2 includes a meteor-style attack: 
- it marks the player’s current location with a circle that stays there 
- a meteor appears in the sky 
- after a delay, the meteor crashes into that marked area and damages everything inside 
 
Also give phase 1 its own original signature mechanics, not generic repeats of attacks from other bosses. 
 
General design goals: 
- make the game feel polished, readable, and fun 
- prioritize strong visual identity and distinct boss mechanics 
- keep combat fair and dodgeable 
- make melee hit detection forgiving enough for floating or tall bosses 
- structure the code clearly with reusable systems for player logic, bosses, particles, telegraphs, and world state 
- include cleanup/reset logic when changing bosses or returning to menu 
 
Return the full complete code only.