I am not given to strong statements, but in this case I will make an exception---THE BEST GAME EVER!  It's very easy to get started, will run on "slower" computers, and once you get into it, you can't get out!  You get totally lost in the world you create---it's so much fun making  rides and then watching people enjoy them!  I love the way you can pick a  certain person to watch, and see what rides they pick, the way you have SO  much control over designing rides, the ease of making coasters, although  they can be quite fancy, basically I love everything about this game.  I am  not a "gamer" but I got so hooked on this it was almost scary!