Update 0.5.1

[New]:
- Seasonal Features: Added new Enemy decorations, Halloween colours and more to the map! Just enable seasonal features in the extras tab at the main menu.
- Expanded the boss sounds.
- Added more bridges and stairs around the map to get back into platforms more easy.
- Added more background structures.

[Changes]:
- Reduced the music volume range from the radios.

[Bug Fixes]:
- Fixed not being able to die to some damage sources.
- Fixed collision issues regarding the first boss.
- Fixed collision issues related to many props.
- Optimisation improvements.