Gemini Flash vs Pro: a light-spirit arcade game in one file

Create a complete, single-file HTML5 game called “Lumina Drift” using only HTML, CSS and vanilla JavaScript (no external libraries). The entire game must work in one .html file.
Game Concept
You control a small glowing light spirit named Lumina floating in a dark, dreamlike cosmic ocean. Your goal is to collect floating light orbs and star fragments to grow larger and expand your light radius. Dark shadowy creatures and expanding void zones try to shrink and extinguish you. The game is endless and gets progressively harder.
Core Features to Implement

Full-screen HTML5 Canvas
Smooth mouse / touch controls: Lumina gently follows the cursor/finger with easing
Player (Lumina): a soft glowing orb with particle trail. Size and light radius increase when collecting orbs
Collectibles: bright light orbs and occasional larger star fragments that give bigger boosts
Enemies / Hazards:
Slow-moving dark shadow blobs that reduce your size on contact
Expanding void zones that appear over time and damage you if you stay inside

Progressive difficulty: more shadows, faster voids, denser obstacles as score increases
Visual style:
Deep dark blue/purple gradient background
Soft bloom / glow effects on the player and collectibles
Elegant particle systems (light trails, collection bursts, ambient floating dust)
Subtle parallax floating islands or nebula clouds in the background

UI:
Current score (based on total light collected + survival time)
High score saved in localStorage
Light radius / size indicator
Start screen with title and “Click to Begin”
Game Over screen with final score and restart button

Audio: Optional simple procedural or oscillator-based soft ambient tones and collection sounds (can be muted)
Responsive: works on both desktop and mobile

Technical Requirements

Everything in a single HTML file
Clean, well-commented code
60 FPS performance
RequestAnimationFrame game loop
Object pooling for particles if needed
No external assets or libraries

Make the game feel atmospheric, slightly dreamy and satisfying to play. Focus on beautiful glow effects and smooth movement.