Yep, it's an art project.
Results may look very cool, but I don't know what it's doing in an IT course other than as a refreshing break. Oh wait... there are some things specific to electronics: airflow, static electricity, grounding, and not making conductive contact in the wrong places. Maybe shielding, but no-one seems to bother any more.
Recalling some pictures, I've seen a steampunk PC where they mounted the motherboard in a circular baking tray (or two). I suppose it must have been a fully integrated motherboard because there was no depth to it, just this big blank disc on some sort of arm or frame, a small box for the disk drives (just big enough for 2x3.5" drives, I think), and some other gubbins which might have included an even smaller box or pod of some sort. That was just-about the most unusual PC I've seen. I'd like to own it except it requires an integrated motherboard.
Another which made an impression on me was a Star Wars style case. It had this vertical cylindrical case with lots of angular relief in a 3-fold pattern, including 3 vertical strips for windows, and a big triangular motif on top. I think the motherboard was horizontal at the bottom, so the whole thing must have been huge. You'd need craft skills to make the shape and again to produce the used/distressed look.
A simpler steampunk PC was probably based on a conventional tower case, but the bottom bulged out into an impression of a steam engine's boiler. I think the whole thing was clad in strips of wood like very early steam engines.
One of my steampunk ideas I never used included a large slow-turning fan at the front lit by the yellowish light of under-volted grain of wheat bulbs. (They're normally under-volted.) The trouble with this was I wanted a screen to keep the dust out. I later found speaker cloth can work well for that. New idea: Large slow-turning fan behind screen, back-lit to silhouette it. I don't think a slow-turning fan will make much airflow, but you've got the rear fans for that.
There's probably six million more ideas on Youtube, if you need them.
... I should be making cases instead of operating systems, shouldn't I?