Beardface has done it once again with the release of WiiPhysics v1.3. This incredibly fun program has been given a robust update, with several great new features including the ability to configure the density of objects, and a larger world for you to play in. Here's the changelog for WiiPhysics v1.3:

1.3.0
+In Game Help
+Pen Drawing added
+Reset Button Added
+Added BG Music
+Bug fixes
+Initial action sounds (Using Sndlib)
+Intro Screen while wiiphysics constructs
+Main Menu
+Added Prismatic (Slider) Joint
+Added Settings Menu
+Added configurable Color
+Added configurable Density
+Added Show/Hide Menu Button
+Increased world size (no longer hit the bottom with too many objects)
+Fixed layout
+Reset velocity to 0 if you grab an object
+Set Velocity of Selected objects to whatever the velocity of the wiimote is
+Fixed Freeze Unfreeze (Hit B while you have object selected to swap)
+Dynamic Gravity Setting GUI
+Dynamic Restitution GUI (Change individual object bouncieness)
+Dynamic Friction GUI