Phineas and Ferb's: Coolest Coaster Designer Ever

Phineas and Ferb came to a great discovery and decided that you can do the roller coaster itself, which will be ridden by everyone.
In this game you will need to help Phineas and Ferb to build a roller coaster, and make this construction correct and strong so that people do not fall out of it.
So before you will be a large sheet of paper on which you can place different parts for the slides, these will be double loops, accelerations, and much more.
You can make slides long, which one you choose, just build everything correctly. Then you can experience the strength and power of the slides when you ride them yourself.
It will be very fantastic and cool.