First of all, congrats for putting so much work into it and continueing your work.
That´s an achievement.
Here is one thing which improve your panels:
Learn about the horizon line and how to arrange your figures in perspective.
The horizon line is always too high in your panels. The background has a completely
different perspective than the characters. That´s a typical mistake and it´s actually
easy to fix.
The horizon line in most of your panels is in bird perspective, the characters are not
drawn in that perspective