You got leftover, salvaged technology filling in the role of magic. Here is a dialog scrap to explain:
Sophia: In a way, its magic that's real, but, you see, its not real magic. Magic that's real works by exploiting physical laws to generate the effects of magic, while real magic tries to evoke supernatural powers and is therefore not real.
Shango: Wait a second, you're telling me that magic that's real isn't real magic while real magic is not real?
Sophia: Kinda. You see, any sufficiently advanced magic is indistinguishable from technology.
(Ideas stolen from Arthur C. Clarke, Daniel Dennett and the creators of Babylon 5 and Doctor Who)
Actually, its so common, its a trope.
Though its not like you start out with microchips, the advanced materials are endgame content.
As to what it is, as the summary says, it's a fantasy RPG with elements of economic simulation games and other ideas borrowed from various genres.
Those systems are used to unlock new areas or advance the story.
The town building system is used to generate resources.
Resources are either used directly or as material to produce soldiers.
The soldiers are used in the conquest system, to conquer new areas.
The space shooter is used in the intro and then again at the end of the game to reach spacestations.