Scratch

I am currently creating a game called AntiGen. I'm not going to reveal much but it will use an advanced ball physics engine. I have tried to create one, but it seems to be very hard. Thats why I am offering you the chance to try and create a ball physics engine like this one, http://scratch.mit.edu/projects/Prestige/1009535 .
Here is what it must be able to do/contain.
-1s1s (preferably)
-Be able to bounce or not bounce
- Smooth Jumping + moving
- Arrow keys to control

Advanced features ( not necessary)
- Bounce at different heights depending on what color the ground is

If you make one, please add it here - http://scratch.mit.edu/galleries/view/80770

Thanks!