I own the game myself and it fun to play it during long train travels. All you have to do is build rides, complete missions, search things and own other people in minigames. Imo it's pretty fun, but it's far from a RCT3. Ok, the building style from the coasters are the same but you are pretty limited with building a ride. Scenery there, path here, other thrill ride there. So yeah, it's hard to get even get a decent ride and a full circuit [:D]
I'd still like the game. Sooo many minigames. Also there are only like 5 parks. And i'm currently at the 5th park since it's not so hard game. Also it really grant you quick to the next park. Park 1-3, are 100% gold now on the missions...