You won't want to leave your musky dank basement...
When building rides, you get to have feedback from the customers riding it which is really cool, because if they don't like it, your theme park is going to flop.
You get to build anywhere from traditional coasters, to coasters that loop de loop, to even water slides. Not to mention the sleuth of Sidewalk food buildings.
The funnest part is raking in the cash. You have a full line of tools to help you manage your money as well as take out loans for those expensive, I need them right now! rides.
This game gets addictive really quickly. It'd really fun once you've built your base theme park to go back and start putting in nice scenery from the many scenic themes available.
Oh, and don't worry about people throwing up, littering, or your flowers dieing. They have custodians that you can hire, along with police officers and clowns of all sorts.
All in all, this games rocks and I will continue to play it for ever.