Your scene atmosphere is created really well, with a unified visual style and strong immersion, which shows your intention!
Two small optimizations from a UX perspective for reference:
Interaction consistency: I found that the objects that can collide and the objects that need to be collected use the same highlighting effect, which was a bit confusing when I first played. Suggest using color differentiation (such as green=direct interaction, orange=need for props) to reduce cognitive load.
Volume Preview: If the slider in the settings menu can play a sample sound when adjusting, it will give users more control over the volume level and avoid repeatedly entering and exiting the menu for testing.
These details can make the experience smoother, come on!