Click and drag the boxes to move around. Hold z when releasing a box to throw it instead of dropping it. Hover a box and press x to change the type of box. Hold space to cause an earthquake. Move the slider to change the number of blocks.
This is based on a demo project called "Falling Blocks" (I think) in Scratch 1.4. There was a challenge in it asking the user to make the boxes bounce when they hit the ground. I used a velocity system to get this to work, changed the costumes with the ability to bounce sideways, and added a handful of other features as well.
