It could use more...
1. It would be helpful to be able to look around by swiping the camera across the screen instead of just using the walk control.
2. There needs to be more than just terrain. You should add things like rocks and trees and even grass to make the environment more interesting.
3. It would be cool to add a house you can go into, it doesn’t have to be a big house, but adding a house would be cool.