Hey guys thanks for the critiques and comments!
@Polder: Thanks! Yeah I agree the background image could definitely use some work. I will model the elements perhaps next time.
@Octanetry: Thank you:) In terms of the texture, if you do the UV-mapping in blender onto the image you want for the final, it will simply scale above the natural image size (just be sure to make the texture seamless so this doesn't look fake). Hope that answers your question.
@Acc24ex: Thanks for the comments!

Am a little bit proud of the white cubist 'plumf', my own creation with blender sculpt haha.