Didn't have time to play this to the end, but just to say I agree with the other comments here that the combat system feels a bit too complex for a jam game and presenting too much to the player right away. I don't mind the lack of exploration too much since it's a valid choice to make a game more focused on combat missions, but the story did felt a bit too generic and some dialogue between the sisters would've been nice, otherwise they just don't feel much like magical girl sisters. Also complexity aside, the combat felt a bit too slow and I think it would've been better if player and enemies dealt more damage.
Otherwise excellent battle animations, cute characters and the combat system was clearly carefully planned and coded, the UI is also very good presenting the information about what the magic does in a clear way (except for the character's unique abilities on the main menu outside of magic, maybe they should've been put in a "Special" section so they can have tooltips upfront too?).