The concept of this program seems really cool. I don't fault it for having poor graphics, because I don't think that is the intent of the program, but rather to accurately simulate the Mercury spacecraft in flight. Anyways the reason for the average rating, is because the program will not install on my computer (G4 dual 1gig) for reasons unknown. I'm giving the programmer the benefit of the doubt, and we'll see if he can enlighten me on what the problem is.