I saw in the screenshots that you can ride or create other attractions, like an Intamin free fall. But how can i create it, i try with the objects editor but i can't buil any attractions! Please, help me! Thanks.
You can't ride them. They are static models. To create them, you first need to create a model in an application that can export to either 3DS or OBJ files. Then you can use Object Editor to import the object into the game.