You did take the theme literary :D
The concept is simple and efficient. I must say I've struggled a bit at first 'cause I did't get the items actually have to touch the balance to be taken into account (stacking them does not work!). It's a bit counter-intuitive because the physics is quite good (I find it funny to be able to throw items :D).
With a little more polish, it could be a very good relaxing game :)