First Impressions: [6/10]
at first glance what i thought (sometimes unedited thoughts
and how my mind works when i first look and access)
"oh. it moves. [stretch of time passes] why? is it necessary?
it does not seem like it adds/enhances the poster. to me it hurts it.
so what is she doing. she's walking. towards his back while laughing like
she's going to sneak up on him and yell boo! looking at
the rest of the poster: it does not have a WOW factor
to me but its appealing"

Technique: [12/20]

how masterful are you at blending/cutting
There is nothing that screams bad blending here. some spots are too "jagged"
that could have been smoothed out while cutting or less sharpened or blurred the edges.
some of these spots are circled. see the dude's hair lines.
also the guy's legs have been chopped off. i would suggest either smudging
his legs and extending it to the bottom, moving him lower, or
changing the size of the canvas. additionally, the spots are circled on the
character's faces, the brushes/stocks overlap them and
i think it would have been better to erase them out,
it may be subtle in this poster, but with other textures/brushes
it could be distracting. i just thought it was worth mentioning.
this now is only the super observant may notice:
what happened to the rounded edges on the girl's picture?
i'm not sure if it wasn't made properly or got processed and changed but
just in case. in photoshop: use rectangular marquee tool to box image,
go to the bar on top, select > modify > smooth
lastly, the arrow on the bottom points to the difference in color
i feel like this was unintentional/overlooked.

Resources: [12/20]
does your images/stocks/brushes/textures enhance the poster
first i'll talk about the image of yunho. that's a hard image to work with
i would not have used that image of him unless it was more zoomed in.
or i would only use it to take advantage of the angle
he makes with his neck and the space there. 
the girl's image, shes ok. theres