Wow that coop looks nice. It really came out great, and the sign is a nice touch. I had hoped to have my coop started by now, but have had some health issues so I put my plans on hold. It's nice to follow your progress since I don't have a project going.
The coons will be your biggest battle with chickens. This time of year they get very agressive, with the females looking for food for their young. They attack the chickens until the corn is ripe enough for them to eat that. Make sure the coop is closed every night. I had thought about installing an old garage door opener and attach it to the chicken door. That way if it was in view I could push the button from the house and drop the door closed, even during a heavy rain. Open it in the morning while making breakfast. I think you are probably joking about the broken glass, but if you aren't it will not work. They will pick it up and play with it. The only sure way to keep them out is through physical strength (built it like a vault) or an electric shock. Once they get in, it will be more difficult to keep them out next time. Hawks and owls will get some too, but they're not as difficult to keep out of the coop. I do remember as a kid, doing chores in the morning and finding coons still sleeping in the coop after eating chickens. One morning we found a red tailed hawk in the coop on the roost sleeping in the middle of a row of chickens. That was a difficult bird to catch once it woke up with no place to go. Feathers and dust everywhere! We did finally catch it, took a picture of us holding it, and released it.