- Replace manual CSS scaling in index.html with Phaser's built-in FIT mode,
ensuring canvas always fits viewport while maintaining 1920×1080 aspect ratio.
- Add scale configuration to game config (Phaser.Scale.FIT, CENTER_BOTH).
- Refactor all DOM UI overlays to use fixed 1920×1080 dimensions with
transform-origin: top-left and dynamic scaling based on canvas rect.
- Implement _syncOverlayToCanvas() in MainMenuScene, NewPuzzleScene, and
PuzzleScene to keep DOM overlays perfectly aligned during resize events.
- Fix UI element positions in MainMenuScene and NewPuzzleScene to match new
coordinate system (e.g., title from -30→45, buttons repositioned).
- Update Phaser CDN version from 3.9.0 to 3.90.0 (likely typo fix).
- Fix particle emitter creation syntax and stop() instead of on=false.
- Clean up resize listeners on scene shutdown to prevent memory leaks.
Brian Fertig