Hello there,
Arvus Games has other games, with Roundscape been the flagship. Even though Arvus has other team members, Kal is the sole dev of Starmaker, everything is done only by him. As for the question on AI, the art is the only thing done with AI, it is first generated and then worked on top by Kal as well, some things like some of the girls hair are done fully manually by him as well so not all the art is AI.
The suggestion about an artist and animator, Roundscape Eclipse's art is fully done by Furanh, and the animations are done by Kal.