Heyya!
First off, congratulations on completing your first jam! A visual novel is no easy feat, especially in such a short time. Everything looks really polished and runs smoothly. And you worked solo on this right? The fact that you got a full visual novel done on your own for the very first time is amazing! You should be very proud of yourself :)
I thought the concept was really cute too! Three girls playing a DnD like for the first time is a fun idea for a slice of life game. I also liked the dice rolling thing and how the actual game play felt like they were in the world. So good job there!
The only thing I'm not too sure about is the idea of the player controlling the actions of all three girls. There were a lot of times where that got pretty repetitive and had me skimming through the text. Especially at parts where all three girls made a decision back to back, like choosing the style/wisdom/magic points or buying things at the store.
If you decide to develop this game further... I wonder if it would work better if the player got to take control of just one girl? Maybe they could even play AS her... getting to name her and stuff. That could also help the player get even more immersed in the story, since the characters would talk directly to the player instead of just each other!
Also, this game could really really use some sound design. It doesn't have to be anything too fancy either! Maybe just some background music (whether from a composer, or royalty free stuff online!), and a few sounds like dice rolling could take the game to a whole new level!
Hopefully these notes are helpful! Congrats again on your first jam! :)
Keep up the good work!
-Sasha