This image would have been more flat had the calendar not cast a shadow, but let’s face it, my bulletin board is pretty flat. And boring. The success here is that I managed to do homework without getting out of bed.
The horizontal lines create flat space. What is this bottle filled with? I have no idea. Why is it conveniently placed against one of said horizontal lines? I put it there.
Affinity of color. Normally I edit photos from my phone, and I could have brought out that shadow more, but I intentionally kept the photo as high-key as possible because the shadow would suggest a bit more depth. Walls that fill the frame = easy way to create flat space.