Into what i can see , the outif looks outstanding very good!
But the spriting needs fixing , the sword , especially.
The feet dont look very good and the shading is bad i bet that you can improve .
But as this being your first is really good
However, the animation is kind of bad.
And i dont get it about the backpack.
The sword swing looks really REALLY undecent and the ears make just one move , while he is fully moving his body.
But you can improve TOTALLY TOTALLY improve more so keep trying and dont give up on anything of this NEVER NEVER!!
Your critiquing technique is bad and needs to be improved.
But unlike what you did, I'll tell you HOW you can fix your problems.
First off, offer advice. Don't just say it's bad. Even if the artist already acknowledges that.
For example you could say:
"Instead of black outlines, perhaps add some darker variants of the colors to show a little more contrast. It's more work but it will be rewarding if done correctly!"
The only..."helpful" part of your critique said something about the ears. Otherwise, you need to change your attitude. This critique was very rude.