Good... I like it. It's educational!

Good

I realy like this game :) It whas something new.

not bad

but its really easy and the cursor doesn't react fast enough many times

If you're going to do a physics game...

Please get the physics right. I would click on an object no where near the little roll guy and he would just start moving. There were times when he would slide where he shouldn't have and times when objects would slide or move in wrong directions or without me touching them. It's a good idea but the physics need a lot of work. Hopefully you can go back and work on them a bit and then this might work.

???

nice graphics... but controls?......