The physics are lots of fun to play with and I like the concept of looking for lost body parts by throwing stuff around! You may need to reduce the amount of fun that players can have with physics if you expand the game because currently you can launch yourself straight out of the room by using almost any object near a wall.
The environmental models are nice, I like the flat shaded style you've got going on.
I love that everything has narration associated with it! A lot of the descriptions are short, so you can increase the font size a bit to fill more of the text window.
Some music could set the mood. You could also try sound effects, but that could be dangerous in such a physics intensive game since things will bang together a lot.
Nice demo! It showcases the adventure game mechanics and physics quite well.