It's not all that, it's kind of stupid. This really has nothing to do with designing roller coasters, and instead is more of a mini-game to push a free floating car through hoops. Then yea you can ride the coasters but usually it's such a mess it's nothing like a real coaster.
It's only a few bucks at the moment, and its sort of a fun mini-game, but I can't really recommend this.
Oh yea, there is NO keyboard or mouse support, must have controller. Worked ok with my logitech, but it was a pain in the ♥♥♥ to try to figure out what buttons matched up with their ♥♥♥♥♥♥♥♥ xbox layout.
Oh yea then it crashed and nearly locked up my pc.
All in all, pretty weak. RCT3, this aint.