From the blog "Sandbox Update Notes"

+ Added Dirt Cliffs, Grass, Snow, and Sand as inventory items + Added a new font that can be seen throughout the UI + Added Soccer Ball * Shovel can now raise terrain * Fixed an issue where mouse cursor detection over inventory slots would fail unless the player was standing at 0,0 * Improved item tooltip display * Improved look and feel of buttons and panel UI elements * Items can now be dropped on the ground * Cloud shadows now display in the main menu background