I think this is a great start! However, as someone commented on the game's page (not the jam rating page), the combat gets very repetitive very quickly.
I appreciate the visuals and the basic battle concept and think this could be greatly expanded upon, also incorporating the narrative into the game itself. There isn't really anything alluding to the story within the game (at least, in the three or four battles that I played, but I couldn't really bring myself to continue without something else to go on). I think you're limiting yourself too much if you keep it too basic, it could definitely use some nuance. This game needs some kind of tutorial section before you throw the player straight into combat, otherwise they're figuring out what to do on the fly which is good for exploration but not so good for any kind of action/combat.