I think you could be running into the same kind of trap as Kalentan was on the other page.
Essentially, it's just boiling down to consistency again. Your character and your Temple Gates looks good, and they look to be of the same visual style, but unfortunately the other elements don't.
The first thing that struck me was that with your ground tiles, the outline of the tiles appears to be 2px wide, whereas your character, the gates and the detail on the ground tiles all have 1px wide outlines. It just makes it a bit jarring imo.
Second up, the background is
very different from the rest of your artwork. So much so that I assume it's intentional. If so, that's fine (It kinda looks like a papercraft/collage effect) but I think you need to change up the colours regardless.
Essentially, the "further away" the background element is, the lighter it should be. If you don't then you run the risk of confusing the player due to what is essentially a "clutter" of colours and details.
And again, just my opinion, but I wouldn't use any outlines in the background that are thicker than those of the clouds that you drew. I think it would look nicer that way.
Anyway, keep up the good work! I'm liking your animations and how it looks when you're playing!