Composition is good regarding sky vs. land area. Image is not very clear/sharp and may benefit from a little more saturation to help the sky area"pop". ((5))
ok, please bear with me. voting this challenge is extremely difficult, not just because of the size, but because we are dealing with images that people consider their best. it makes even constructive criticism hard...
i am positive that you saw a stunningly brilliant sunset. i also think that it was beyond your camera's capabilities to capture what you experienced. that does not mean you should quit trying or that you should throw your camera away--it means that as far as challenges go, you might need to work a bit harder to compensate for the limitations of your camera. in the long run, you will become a much stronger photographer, but only if you keep at it. don't take where you wind up with in this challenge personally; maybe just consider it a starting point for the rest of the year. good luck with this, and in the challenges yet to come!