This is a (really) late post for week 6 as I had been busy building the Sketchup model throughout the week and over the 1 week school break.
During Week 5 to 6, i build the outer walls of ADM and tried to import it into Unity and figured out how the collision work as the model doesnt have collision and I figured that I need to add the mesh collider to the model by finding the model mesh among 3 thousands of mesh and use it as a collider. after which, this is the first try I did for the game, i would say it is working better than I expected.