Meh, I'll take a strike to prove him wrong.The problem with the mockup having the menu at the top is it's really distracting.
You have everything outside of the screen, but none of it put together without anything around it, so it's hard to focus on the mockup.
Or at least for me I find it distracting.
Your problem is your drawing straight from your reference and not creating your own sprite from it.
There for you're perspective is all wrong for a platformer.
As I said and will now spot out to you, his leg is being held on by the tiniest joint ever.
Move the leg on the left not the one on the right. :/
And doesn't he have a tail?
I also don't quite understand why there are stones on the top of this wall.