Hello Bohao Yan. Your scene is a desert, which I think is great, and the desert is a great setting for the theme of adventure. But I think there are two small problems with your game. The first one is that the characters walk right through objects when they move. I think you should fix this problem to improve the user experience. Second, I think the movement of the character is too rigid, and the movement can only be triggered when the character is moving forward, and I think you can give the character more movement, which will make the user have a better experience.