The extraction could use some work. i see a lot of white edges all over the place, especially on the arm and the staff. be careful of that, an extraction can break a good wall.
next, the background looks like....well, bad.
it's obvious what you did, and it just doesn't work. i would have rather seen more time spent in the background itself, like redrawing it or vectoring it out, or even having a totally different background. screenshot + filters shows a lack of effort.
finally, the textures over the image are a bit much. i personally use textures, but it seems like they were way overdone on this one. it makes everything look really weird and almost low quality. so, lighten up on the textures. less can be more.
overall, nice effort. the composition is nice, and so is the idea, but the effort just isn't there. next time, don't be afraid to go the extra mile. quality over quantity :3