Yes. In the 80's.
you get stars in every track like me and go very fast
Yes
Yes a roller coaster can go faster than 100mph. The fastest is the Formula Rossa Roller Coaster which reaches speeds of 149mph.
No.
If in roller coaster designer you get the coaster to go underground, then that's the problem. If you load that coaster you can't put a part of it underground.
Kingsda Ka was once the worlds tallest and fastest roller coaster. It may still be now! It is green and blue and you start off at the fastest speed it will go at.
I want to go on that roller coaster
The fastest roller coaster at Disney World is the Rock 'n' Roller Coaster Starring Aerosmith, which goes just under sixty miles an hour. The fastest ride at Disney World is Test Track, which has a maximum speed of 65 miles per hour.
It was the first roller coaster to go around a full circuit in America
A roller-coaster would go faster with more people in it because with moer people the better the ride alsothe people that are ridding will give the roller-coaster potential energy. A roller-coaster would go slower with an empty car will give the roller-coaster kinetic energy than with peolpe in it.
It could, they just make you get off so people behind you can get on.