What could I improve in this test game? (it will be a proper game soon)

I’m working on an adventure game, with my own animations.
Current working things:
Walk/Run Animation
Jump/Fall Animation
Custom Camera
Custom camera controls

I would like ideas on a skybox, more buildings and other things
P.S: The terrain map is randomly generated


robloxapp-20200920-1821345.wmv (4.2 MB)

Full map screenshots

Link: Robloxian Adventures - Roblox