Duck hood was done well, colors could have been a bit better but that takes time.
The palm tree shades were fine, but I'm not entirely sure on why there's a purple recolor of it.
Tiny top hat doesn't need an explanation, looking at you cutieno.
Sand castle hat is pretty good, especially for someone relatively new.
Sun helmet idea was nice, though it would've also worked well if it pointed upwards from the middle of the helmet (if that makes sense).
Canada/4th of July hat stays relatively the same for all frames besides a few minor changes to shading and whatnot, pretty lazy.
Sun hat, uhhh, dithering in 2k17 graal LUL.
Shark hat has a weird perspective, but it matched the way it's placed and angled.
Jelly cap is simplistic which I like.
Scuba mask, I'll let these two pictures speak for itself.