I hadn't thought of painting the entire thing but, maybe framing the boxes? I do want it to look like little windows so, maybe it would be a good idea to do something like that. Thanks for the suggestion!
I had originally planned to put a tree branch decal on my wall but, due to some patience issues that plan failed miserably. Instead, I was able to draw/stencil my own tree branch and paint it directly onto my wall. The advantage of doing this was that I was able to make my own color palette and it ended up being much cheaper, which is always a plus.
I drew music notes on my full length mirror coming up from a piano. I then made the notes extend onto the wall by painting a scale coming up and out of the mirror. It was my first project in my new bedroom and it was more difficult than it looks. I'm proud of it, though!