Well, I was planning on doing a lot more with this, but apparently when I saved it halfway through the colouring process, I accidentally saved it as a PNG instead of a SAI file, so I lost all of my layers.

So, I had to save it as best I could and ended up with this. There was a lot more I wanted to do with it, but since it had flattened, I lost access to all of the layers that had the stuff I wanted to detail.