Two Questions

1st Why can't I seem to be able to make things underground?

2nd Whenever I build a coaster with a high ecxitement raiting, such as 6.79, and then charge alot for it, like $6.00, the excitement raiting drops to something like 0.98! What's wrong? In the other games, you could charge exactly the excitement raiting and the peeps would ride it.

I don't have the game, but I remember reading that you wouldn't be able to build underground at all.

1.) You can't
2.) Get Update 2

1. can't build underground. What you can do is to dig trenches and run tracks into them and place scenery roof pieces over them. It can be a pain, but it makes a cool visual for the ride.
2. first update fixed it for me...

I made a replica of CP's Disaster Transport that came out okay. building the structure around the track was time consuming.
i made a psuedo underground coaster (see ans #1) i put a pond that the track went around, lighted sections w/the pathway lights, put some dino's in there... the kids loved it.