Very good job on your first coop. I agree about the need for exterior paint and some way to protect the floor from rot. Put an extra screw or fence staple to secure that heat lamp. If they get spooked and fly into the light, the spring clamp won't hold and a hot bulb and pine shavings are a bad...
You should be able to see the welded wire stapled to the outside of the windows in a couple of the photos.
Additionally, we buried 24" wide hardware cloth around the entire run stapled to the bottom 2 x 4. We have foxes and raccoons here in Western Mass.
I do have 1" by 4 feet air intakes at both of the soffits (covered by 1/2" welded wire) and the ridge vent under the metal roof. Is this ok?
The 4 windows are sliding lexan and can be opened a little or a lot.
Just finished my coop. Copied from Carolina.
All 4 weeks old coming 9-19-2019 from McMurray's
Barred Plymouth Rock
Black Australorp
Buff Orpington
Red Star
Whiting True Blue
Can't wait!