Thrillville: Off the Rails review at Gamespot.

"Unlike its console counterparts, Thrillville: Off the Rails for the Nintendo DS isn't really a theme park management simulation. Instead, it's more of a role-playing game with park design aspects, minigames, and some story all mixed together. While that's not necessarily a bad thing, the lack of in-depth features may limit how much time you actually invest in the game, especially when you discover that no skill is required to keep a park running."

Full Source: Gamespot