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
A huge calculator for 8-bit numbers. Adds and subtracts numbers from 0 to 255. The blue switches are number A, the orange ones number B, highest bit on the left. The purple switch turns on subtraction. The answer lights up as three big digits, with a minus sign on a red display to the left. Inside: 8 full adders, a complement unit for negative numbers and a decoder made of 511 AND gates. The yellow screen at the top right shows the sum being worked out. It is set to 200 + 57 right now.
Control panel
Block outlines are not drawn on very large builds so everything stays fast. You can still select a block by clicking it.