I want to submit my game in ludum dare, but int lasts hours i cant make runnable jar file!
i am using jarsplice, when i make fatjar i am trying to start i, but its closes almost instantly( i can see black screen for half of second), few hours ago i dont have this problem! help me please 
Run it through the console and tell us the error.
Use:java -jar “fullpathtojarfile”.jar