Beautiful terrain work, player character modeling and animation, and music! 100% love the music and want to know where you got it, or if you made it, how can we get more of your music!! I think it's a great thematic "walk on the beach" and a very chill experience.
As for feedback, I would love to have seen some easter eggs (if you explore over here, something happens), or some major terrain landmarks that enticed me to go explore. If the only gameplay element is walking, you want to really try to make sure that the player has lots of reasons to keep walking around. It's a hard problem to solve!
Great work, and congratulations on submitting!