Seems to be missing files it needs to run. It opened the resolution chooser, but freezes up after that. Running the .jar from console I get this:
java.io.FileNotFoundException: C:\Users\Name\Desktop\Demo%20Day\Dungeon%20Crawler
\Win64\config.xml (The system cannot find the path specified)
and later
Catched FileNotFoundException: C:\Users\Name\Desktop\Demo Day\Dungeon Crawler\Win
64\lib\gluegen-rt-natives-windows-i586.jar (The system cannot find the file spec
ified)