Question

In state court, a losing party can appeal a case if

Answer 1

Appeal is a claim by losing party that lower court has made mistake of law.  

Normally a losing party is entitled to one appeal as right one.  

Every lower court has a supreme court which listens appeals from appellate courts.

United States is a federal system with central federal government and individual governments for every of fifty states.  

With other branches of government every states has their individual complete judicial system as United States itself as federal courts.  

There are significant differences between federal courts and various state court as they don't share common properties.