New update released!

Release notes v0.5.2:
- New level. Scary boss!
- CPU and GPU performance optimizations for better FPS.
- Network performance optimizations for smoother multi-player.
- Adjustments and improvements to some tower and enemy models.
- Additional upgrade level added for Laser Turret in nightmare difficulty. It's automatically available if Laser Turret is equipped in the inventory and you're playing nightmare, just like some other craft tower upgrades.
- Player colors adjusted.