I think what this is missing is some way that each character can interact with their environments. Like instead of combat, maybe Alice cuts trees and Bryn can shoot targets? Then their actions have a bit more to do with the environment than just a vague attack and it's clearer how they could work together to solve problems.
Camera controls are also janky, but this is a 48 hour game jam and IDK how y'all even managed to put out something that compiled in 3D in that time so kudos to you on that! Especially since you made all those assets!
Also, the 2D art is absolutely fantastic! Maybe a better way to implement this idea is to play off some of your strengths and try some 2D out? I'm biased, but making a maze in 2D isometric or something might be fun to try?