Update #6

## Update #6

### New
- **4 new campaigns** have been added
- **Endless max level raised to 17** — you can now earn up to 16 upgrades
- **Upgrade offers cycle** when the remaining pool runs low

### Improvements
- Feature adjustments and QoL tweaks
- Visual polish
- Terrain and map refinements

### Fixes
- Various bug fixes

Thanks for playing and for your feedback!