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Firstly, nearly everything about this piece is a step up from what you've been producing in the past. I haven't seen much art from you (not pixel/Phoenix Rising) recently, so I assume you haven't been doing a whole lot, but this is definitely an improvement.
Only thing that bugs me about this tag are the vertical crops either side of the focal. I appreciate them and see what you were going for, but for me personally, I feel it interrupts the flow a little bit. If you incorporated some more crops into effects, made it more geometric and angular, it would definitely work really well, but for me, feels a little awkward.
Also, that red 'U' shaped thing to the left of focal, tone it down or remove. <3
But yeah, use of textures is really good, colours are good, composition is good. The only other thing I can think of is possibly a few more shadows in the background and highlights on focal to make it pop more, but honestly, it is pretty damn good as it is.
As for the pixel art, you know I'm not a pixel artist, and using the very limited knowledge I have, I can recognise this as technically very good, and aesthetically very good. The only thing I could mention is that as it was used as a graphics piece, (ToTW) that adding more graphic elements to enhance your pixel art could be interesting. A sort of cross media type thing. Adding some like wind blowing, or some texturing or something like that as post in Photoshop would be pretty cool. But again, just nitpicking really.
So yeah, good job on it all! ;D