> made me want some old school floppy drive and monitor sounds
if you use the mame emulator to play, you get some floppy sounds :-)
https://www.mamedev.org/
I consider the source code to be part of the game ;-) Your view might be different. But please don't reveal the solution.
Ah yes, there is a tool to select the images and a helper to convert the images for the game. Those are written in gauche scheme. But the game itself is written in the small Lisp.
zeit is using "Lisp in 1k lines of C" https://github.com/Robert-van-Engelen/lisp
See below, maybe it helps? Important is to click the emulation window with the mouse to give focus.
Part of the game is to find out what works but yo can go north, west, east and south (keys: n w e s or cursor keys)