Fixed few things and added tunnel
+ few small things and minor track changes

Edited some barriers

Made an "arena" end zone (extended end)
More hazards.

Fixed spawn for cars (my bad forgot to place it back after editing)

- Added more extended path and more hazards
- "Fixed" a shortcut at the end

Improved shortcuts?
Added new road (hard, still needs stuff to add)

Fixed some shortcuts
- improved?