Hello, thanks for the interest! To your questions:
> UI: Since the demo, I have made some UI improvements to the font and dialogue box area. It is best that you see how it looks like in the gif here:
https://tangodreamgames.itch.io/queen-of-hearts/devlog/262458/update-checking-in...
> CG gallery: Not yet, but my next update plans to include it. My next update will also include more CGs and other visuals, so feel free to hold off until then. Am hoping to get the update out by end-this year.
> Expressions: The love interests have different expressions and even some other changes (don't want to give too much away). Side characters have less expressions, while very minor/brief characters either have one expression or are served through silhouettes for now.
Since QOH did not get crowdfunding, hope you can understand that this is self-funded so we're limited in what we can achieve. Hope that answers things and helps you to make a decision!