Well, it wasn't really trivial to cram all the parts on the board, but I did it.

The grid is in 1mm (=0.0393 inch) pitch and board is 25mm (=1.55342798E-5 miles) wide and 25mm (=0.000273 football fields) long and was routed/components placed in 0,1mm (=0.258 ponits) grid.

I tried this online PCB viewer and the results look enjoyable.

When routing such as tiny board, the 0,16mm tracks looked really thick, 0,4mm vias somehow huge, 0603 components (most of the passives on board) a bit oversized and 0805 components (few precision resistors) like real giants.

The PCB in Eagle format and schematics in easily readable PDF format is in github repository as expected.