Thank you very much for your feedback
Yes, in order to make up for my weakness, I have used pre-made assets, mainly the scene's tilesets and scene objects([Pixel Art Top Down - Basic]https://cainos.itch.io/pixel-art-top-down-basic), other characters and skills are made by my good 2d art friend (cute slime).
Thank you very much for your suggestion, I will absorb it and add it to the game in the future.