Very fun game, I hope to see it updated / continued in the future, though it seems like the creator of Familiarity is on a bit of a hiatus.
It's said that this game was inspired by "Witch's Familiar" by Perri, and I can certainly see that.
UI is pretty standard for HTML text based games; Black with the side tab for going back, saving, seeing your stats, etc. Easy to use, and all that. For me in most cases with text games it's mostly the story I pay mind to anyways.
Speaking of story - The main character, you, gets caught up in an accident, and gets saved by the witch, who turned you into a familiar in order to make sure you didn't die.
What bits of story are there so far is pretty enjoyable. Like someone else mentioned, you get to be the cute cat person in this game.
Seems there's two stats from what I see. "Instincts" and "Magic."
These only seem to influence the story in somewhat minor-seeming ways given its early state of development at the moment, but they're there.
IIRC it's explained at the start what exactly they do before you get into it. I haven't played this game in a little bit, so my memory is a little fuzzy. They influence choices you can make and bits of the narrative writing, in any case.
I'm glad I ran into this trying to find "Witch's Familiar" before finding out that game had been deleted by its Dev, Perri. I certainly suggest playing this yourself and seeing what you think of it, even if it's unfinished.
Oh, and there's a big shark plush. That's a bonus if you ask me.
As of me typing this it seems Transmorph hasn't updated the game for a while. I'll have to bookmark this and periodically check in to see if they update it again later.
Until then, I'll simply wish them well and hope they come back to it if they feel like they want to(and/or can) in the future. It'd be a shame for yet another rather neat game like this to collect dust.