Good work for a 72h game jam! It has its charm.
On the concept, I think it is too similar to undertale, I have never played myself but I could sense it is kind of a copy. Anyway, it is a lot of work to create all these systems, so it is a huge implementation effort, congratulations.
There is something weird with the player's hair when moving sideways. It looks like it has longer hair moving vertically and shorter moving horizontally
The battle enter is too sudden. There is few time to understand: "ok, a random battle is starting". Pokemon and Final Fantasy does it very well, but locking the player movement, starting the music before the battle and then using a simple screen transition would make it feel much batter already.
The charm explanation after picking them disappeared too fast I couldn't read. I guess it's a bug. Also, I think I couldn't use them? Nothing new appeared during battle. But it is hard to tell if it works or not, because I couldn't read the effect.
I didn't understand the lever puzzle. Maybe you have to pull them in a certain order, but it lacks feedback for the player to understand what is happening, that the lever is returning or something.
About the battle, the patterns are a bit too fast to dodge, you have to memorize them, and they feel more unfair than hard. And during attack, you use white to communicate a 'hitbox' and then, when the attack ends, the field area square gets white too, so you feel like it could be a hitbox, so you think twice before exiting to pick a choice. Maybe all the hitboxes could be red, and to indicate the attack state, you could make the enemy animate, have red colors or add some red borders to the entire screen (just some ideas). To make this right you should probably do some playtests and watch other people play.
Well, sorry for the many feedbacks haha. Hope I could be hlepful and you use to make the game better and to learn a lot! Congratulations on making it! Huge effort for a 72 hour jam o/