I need help making my new Game.

Hi,
I am making a new game which is quite similar with Tiny Wings,
I wanted to know how to make the physics of my character to be able to do exactly what tiny wings does.
For example:
When i touch the screen the object comes down when it reaches the hill, it slides perfectly on a angle and not perfectly on another, and then slide up and go into the air- AGAIN AND AGAIN.
Please Answer
I am making a new game which is quite similar with Tiny Wings,
I wanted to know how to make the physics of my character to be able to do exactly what tiny wings does.
For example:
When i touch the screen the object comes down when it reaches the hill, it slides perfectly on a angle and not perfectly on another, and then slide up and go into the air- AGAIN AND AGAIN.
Please Answer
Comments
Start working on the project, and as you have specific questions, then ask those.
Don't ask us to re-create Tiny-Wings for you.
Ask specific questions. Not, "help me make my game"
Good luck!