Very cool! I would recommend looking into a way to give players a tiny bit more control over what value they move under. Maybe before they move after the first roll, they can try one re-roll? Add a sort of risk vs reward to consider? You would need to implement a sort of "go" button so users can accept or re-roll their first movement value.
Great start! Super charming music and visuals, and the randomness can lead to some pretty goofy outcomes!