Seems like there are no holes, but I could be wrong. The top part of the tunnel is obviously too thin but that is acceptable. Seems a bit short for a straight road. The finish line has too little space for braking, you will always crash into that wall. You can move start and finish positions to correct those issues.
![[Image: oJ6eTtU.gif]](http://i.imgur.com/oJ6eTtU.gif)