Patch Notes v2 – Further Optimization

Fixes
- Resolved an issue causing zombies to spawn far more than intended.
- Corrected several NPC dialogue inconsistencies.
- Fixed audio glitches affecting immersion.
- Adjusted direction logic for William.
- Balanced stamina usage for Mech & Jetpack.

Additions
- Added a **free Mech** to the Mech Bay.
- Introduced a new system to **increase difficulty** dynamically.

Adjustments
- Tweaked spawner behavior to **speed up encounters**.
- Removed gate to streamline progression.