Survival mode puts you in a simulation where you go faster and faster (no brakes) until you die. Eventually you'll go so fast that every little bump sends you flying.
Great Scott!
A track in space. I hate this one. Very hard to play cleanly.
Most tracks have a reverse version with a different daytime, weather, or in some cases alternate paths. This is the same track as above in reverse.
Big jump. The reverse version sends you back up through a tunnel inside the mountain.
There are also a few extra tracks made just for this Barracuda Model B type. Trying to use it on the normal tracks is nearly impossible because it goes from 0 to breaking-the-sound-barrier in 1 second.
Seeing this for the first time is like...