Would definitely love to see a full game like this!! It's so much fun coming up with designs and trying to add your own flair to the commissioned dresses while sticking to the prompt. And the execution of the idea is really well done. I liked all the details and the way the shop looked. Also the cute kitty that jumps after you click it several times!! Adorable!
As for the things I would like to see in the full game I must agree with other commenters about the desire for more patterns. I definitely wanted to go a bit wilder with sleeves haha.
Another thing I can think of is maybe some other means of control during the sewing part? I get that it probably meant to imitate how you would move cloth with your hand in real life, but at times I felt very unstable using my mouse and wished I could switch to keyboard instead.
But nonetheless, I think the game has a lot of potential and dearly hope it becomes a fully fledged project!!