Numberland

Instructions:

• Drag blocks into the mirror to make a clone.
• They need to be "standing tall" to fit in the mirror.
• Drag one block on top of another to stack them (add).
• It's not currently possible to "split" blocks again (subtract).
• If you run out of "Ones" you can click the sun to get another one.
• Right-click a block to change its width, up to a max of five (not available on touch screen).
• When combined, blocks get the greater width of either block that was combined.
• Have fun!