How to use 2D Mode:
1
Touch and drag any vertex (red circle) to reshape the rectangle
2
The area and dimensions update automatically as you drag
3
Use the "Random Square" button to create a perfect square
4
Reset to start over with the initial rectangle
5
Switch to 3D mode using the button at the top
Minecraft-Style Builder:
1
Click "Add Block" to place a block on the floor
2
Click on any block face to add a new adjacent block
3
Toggle "Free Build" to place blocks anywhere in space
4
Use the material palette to choose different block types
5
Drag to rotate view, scroll to zoom, right-click to pan
6
"Remove Block" lets you delete blocks by clicking on them