Hi xingyuan, this is one of the best layouts I've seen. Clean, crisp, and well-spaced for an efficient use of screen real estate. The text in the buttons is well spaced and white space is used smartly. I think you've applied the color theme pretty consistently throughout, and the interactions with your objects are running smoothly.
However, the control interface occupies a slightly larger area, and it may be better if it can be reduced a little, but this may be a special design for different groups of people.
Anyway, well done and looking forward to working together on the final project!