Small bunker for tabletop gaming

I'm new to making buildings so if you think other sizes (wall height, door size, etc) would be helpful, leave a comment and let me know. I just made this 1/4 inch taller to help accommodate the variation in scale of minis.

This is a small bunker that should work for human size characters in the 25mm to 28mm scale. I did this in inches rather than metric and the floor tiles are 1 x 1 inch and the walls are 1 x 2.25 inch panels. The door opening is 1 inch wide and 1.75 inches high. with the roof, the total height is 2.375 inches. The roof also has a 1 inch grid.

If you want to play with the pieces I designed, here is the Tinkercad link https://www.tinkercad.com/things/jQFeIHsGCfu-bunkers-1-inch-scale
You'll find all the pieces I used to make this as well as a couple I didn't use. The roof is assembled from 3 different tile types, a center, edge and a corner. The corner pillars are there to hold the roof in place. Make sure the grid is in inches and everything should snap into plac