Is this StoryShift reskin by any chance?

Well, it started with my youth hate towards Voltra when I created take on StoryShift. I thought to make only sprites and stop on that. But as time goes I came to making my own AU, breaking all Voltra's limitations. I wanted to create my perfect StoryShift reboot that I would like. So yes, both StoryShift and Ignited comes with idea swapping roles but NO personalities. But huge differences is that all characters saves their BACKSTORY from Undertale as well.

Is it Betty from GlitchTale on banner?..

Hell no, mans, what the hell. This is our protagonist, Mattew. Are they male or woman? Hell, who knows. Now they are SHE/HER. But maybe we will come up with THEY/THEM in future.

Does this game have something in common with Facing Demons/Devilovania?

Well, yes and no at the same time. Look, Devilovania was created before UT:Ignited. But after Ignited I tried to make some changes in Devilovania to make the plot of the battle thicker. It's mainly about Metta's affection on Player, some design features, Boogie's personality and all that stuff. But Facing Demons is another AU, you should understand it. It has no relation to events of UT:Ignited

You can ask your question in comments, I will answer them. And maybe they will be added to FAQ in description with crediting your names.