Kudos to the creator! Fitting a bootable Linux on a single floppy was already doable some 20 years ago, my firewall back then was in fact floppyfw (0) running on a 486 board, but in the meantime the kernel grew a lot, despite being much more modular than old ones. Userland utilities and libraries also grew in size, so the accomplishment is not trivial. Thumbs up!