Loving the palette and the expressions, well done... but I hate to say this is not the required 16:9 challenge ratio as 360x180 is 2:1. So maybe you could adjust it and just crop it to 320x180 pixels. Other than that, it's awesome.
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Great, I am glad that I could help. Actually, IMHO the whole composition looks much "tighter" and even better in this ratio now :)