This Kickstarter from Pantera Entertainment hopes to raise $80,000 to develop Theme Park Studio, new amusement park design and simulation game. Here's word on the flexibility they say this will feature:

Theme Park Studio is a powerful set of tools that allows players to build amazing theme parks of their own design. The simulator includes a robust coaster editor that is both easy to use and flexible, allowing rails to be bent, twisted, and shaped into almost any design imaginable. With brakes, accelerators, tunnels, and custom mesh, there is virtually no limit to what players can come up with. Prefabricated templates also provide the ease of click-and-drop designs.

Theme Park Studio breaks new ground with its new custom flat rides designer, a unique tool that gives players the opportunity to design, build, and invent custom rides, or simply select from the extensive library of pre-built rides. Extensive landscaping tools, custom scenery importing, and advanced vegetation solutions that make trees, bushes and flowers react to wind and turbulence make it possible to create stunning, picturesque environments. A full particle effects editor delivers amazing and realistic visuals, and full 3D stereoscopic support lets you experience your rides in eye-popping 3D. When your park is complete, open the gates and watch guests tour your park and enjoy the coasters and rides.