Hi! It's a bit of a wild guess as the details are rather slim, but if it doesn't run at all, it could be because the launcher can't find the Visual C++ Redistributable. In other words, you probably don't have it installed and I probably made a bit of blunder back when I packaged the game.
If you want to give fixing it shot, copy the files msvcp120.dll and msvcr120.dll from the jre\bin directory to the same directory where Rainn and Skye.exe is and then try running the game. If it works, then that was indeed the problem and I can upload a new zip with the fix applied. Otherwise, no idea what else it could be.