Oh man, this is the most fun I've had so far with these games! There's so much to say. First off, I really, really like the presentation of the game itself, the 3D world and the cute 2D sprites work very well together, and it's a look I would like to see for the whole game.
The music fits the mood of each 'part' of the game nicely, especially the town and battle themes. And as for the writing and characters, those are very cute and enjoyable too! I love Felicia and Lily, and for a while I didn't realize Lily's ears were there, I thought it was just part of her hair. But now knowing the truth it makes her design ten times cuter. Same with Felicia's big perky ears!!! I love them and I love these two.
The gameplay was also very fun, from someone who very much enjoyed Slay the Spire but found it a bit too difficult. The three demo fights were challenging enough without it being too much, in my opinion. The only thing is maybe I would've liked a tutorial for the mana and time mechanics, but eventually I understood them.
Anyway, in summation this is a fantastic demo and I'll be following you for future updates, because I can't wait to play more!!!