Yep, its all raymarched :)
It renders a different layer for the octahedrons so that I can change the colour easily. I did manage to get a layer with polygon models working by blending by depth but didn't really find a good way to make use of it.
It uses raymarching :)
The actual fractal based on a menger sponge
https://iquilezles.org/articles/distfunctions/ is a great resource
hmm, involving the printer more is a good idea!
I struggled quite a bit with the core mechanic, each page is supposed to give an indication if the right result is on a later page or an earlier one, but its not as clear as I would like. so in the end, I decided not to make it too punishing (but popups would ad a bit of flavour to missclicks though!)
Spinning speed as health was very interesting! Great variety on the bosses! I would have enjoyed being a bit more focus on the melee attacks.
Satelites are very useful but I found them too loud once I collected a few, I also had some trouble with the mouse - it didn't seem to be locked in place so turning was hard because I kept mousing out of the game. did you use Cursor.lockState? It didn't impact the rating :), it may have been a quirk of my browser