Can I move within a gltf model through keyboard events

[MakitaToki]

I'm trying to implement an effect which is similar to FPS, i.e. using the mouse to control view point and WASD to move the camera in a model. Specifically, it can move within a gltf model through keyboard events. In my codesandbox, it currently can't display anything. Where do I make mistakes? Is my keyboard event implementation correct? Thanks.