Very fun!! The solid fabrics can have different textures across the views which can be troublesome to plan for, and it would be neat if there was a scale available on the prints so you could know how big the pattern was before buying fabrics. When sewing, the sharper turns needed for the wide collar and sleeve caps can be hard to control, so some mouse sensitivity options would be helpful there.
It would also be nice to choose your own discard length - I'm used to tetris-ing patterns IRL, and sometimes you have a section that wouldn't be scrap if you could fit the other half of the next pattern piece in, so you trim off the definitely-scrap section and keep puzzling stuff out. Similar note, it would be fun if seams had to follow a logical order, and seams that crossed others could be in one go (e.g. skirt panels attached then the waistband put on in one go)
A full game of this would be very enjoyable! It would be great to be able to have a more developed shop/customer base, maybe multiple mannequins so if you get started on a bodice but realize it isn't what this customer needs, you can start a new dress without losing the work you've put into the existing one? Overall I'm looking forward to seeing where this goes