I adore the cut-out design of this booklet. I know that AI art is a controversial topic, but I think this is a great use of it - as dressing to the real content, which is the text.
The numbered labels on the maps were a bit small and hard to read, at least on my monitor. It would also be nice if the text in the booklet was select-able, for easy copying and pasting as a GM.
You did a good job describing the rooms - providing only the most important details. An extra line-break between room descriptions would make the text a bit more legible, especially at a quick glance.
The idea of a wizard's tower on an asteroid is awesome. It would be interesting to expand on the hooks you provided on how the PCs could arrive on the asteroid.