Genre boundaries mean very little here. Planetfall arrives filed under fantasy and science fiction at the same time, and the sequence it belongs to, Manaforged Robotics, explains why: magic and machinery are not rival systems in this world, they are the same engineering problem approached from opposite ends.
Writing as Playwars, and also credited as Alex S. Weber, the author works in the corner of speculative fiction where invented systems are half the pleasure. The satisfaction comes from rules that hold together, capabilities that grow, and a cast learning the logic of a world at roughly the same rate as the listener. It suits people who like their fantasy with mechanics they can reason about.