Those links don't seem to be working either. (Not Found)

Well I think you should take pretty much the entire red-boxed in area of he roof out, and stick with the diagonal slanting roof that goes from bottom-left to top-right, it definately looks awkward right there. If you're trying to achieve something specific or unique with that section of the roof then you should tell us. Otherwise, take it out, you don't need it.

Probably due to the quickness of the downward slash, and the small amount of dust coming up after it. I think the last slash of the combo should be the most powerful, and therefore, probably take the longest to execute / has the weightiest hit. And right now, it has no sense of weight. I understand that it's his hand, and not a 200-pound Great Sword, but still, there'd be a little anticipation for the last hit.

It looks really great so far, but I feel the mountains are a bit too tall and too bright, they stand out a lot.. Perhaps changing them to a slightly more subtle color, like brown, would help. You could still add contrast to the piece if you saturate them enough.

If I were to play your game, those mountains would really bother me, sorry.

You had a perspective issue, so here's a quick edit.



If you meant for it to be hanging over the stripes, then you need to fix the other one support, because right now, one of them is off.

Anyways, you have a lot of colors, you can cut some out, like the 2 different, similar, yellows in the mid tone of the stripe and highlight of the orange container things.