Really cool flash game ive come across:
http://fantasticcontraption.com/

The idea is to create a machine in the blue area to get the red object into the red area. It may seem complicated at first but you soon get the hang of it
Create an account and then you can share your contraptions with others.

I suck.

If you're stuck you could always use youtube for "inspiration".

I'll check it out later today (at work atm).