[Circuit] Sunken Cave Zone Port v2.0

Ported with permission given by Kuba11, this is a port of the 2.0 Circuit level - Sunken Cave Zone to 2.2 with a few added features (Such as a finish line and support for Circuit Redux).

This is my first attempt porting something, so feel free to tell me what to improve upon.

Change log

Spoiler:

2.0

- Level should lag less. Thing count has been reduced and fixed a visual error.

- Huge thanks to LeonardoTheMutant for helping this!

1.0

- Initial Release

[Larz T]

Welcome to releases!

[UrbanPie]

Map has been updated!

Thanks to LeonardoTheMutant, for helping me, the map should now lag less with a visual bug where your character disappears should be fixed.