Marple I sent you a private message, hope you are still active here :)
I don''t know how to translate but this is actually brilliant work. Just need to define the foreground more in my opinion.
Mmmm ok. Not sure everybody understand… Google translate tell us this :
"Haha, thank you for the comment, I knew I was not good enough.I will work hard. Thank you"
Very nice! I really like how you have the low sat BG and high sat characters. A small piece of criticism though is the rocks in the foreground - it looks almost like the player should be able to walk on them. Maybe you could give their highlights a bit more saturation so they stound out as foreground details. That aside though - fantastic work and agree entirely with Lanarky.
Wonderful! If I had to nitpick i would mention that the portrait of the girl is a bit too masculine, and looks not so lovingly detailed as the other ones.
I like how the background is faded so that it brings the focus to the characters. With that approach, it would make it possible to make complex levels without feeling too cluttered. Hah, the orc with the two axes is pretty awesome too!
Very efficient style, great colors. I like the small sprites better even than the portraits,
definitely love it! Style, lineart, colors... imo all of that is fantastic. 
Very cool. Like the portraits and especially the little sprites (King & goblin mage are my favorites).
Background seems a little too bleached out maybe.
How I didn't see this before... Since I was a child that I love to create a very tiny characters, drawing as a traditional art... and what I used to draw looks very alike this, but yours is better of course :)