Blueprints
Blueprint from a picture
The picture becomes pixel art made of game blocks: a wall, a floor or a relief. Build it layer by layer from the bottom up.
Pixel art settings
Adds two numbers from 0 to 15. The blue switches are the first number, the orange ones the second, highest bit on the left. A 17-gate adder works out the answer, the green displays show it in binary, and a 49-gate decoder draws it as red digits. The yellow screen shows the sum being worked out. It is set to 5 + 3 right now. Click the switches.
Control panel
Block outlines are not drawn on very large builds so everything stays fast. You can still select a block by clicking it.