Hmmmm. I think this problem is unrelated to the WDLV code (which, other than the missing version number on the Blank project wizard, appears to be working great), but it gives us an opportunity to really make the tool shine.

You're running the Blank wizard, so I assume you're adding your own map and entities and given them the right behaviors. Assuming that, and that you haven't overlooked something simple like marking sure the player is not stuck in the ground, the next place to look is the debugout.xml that is created in your project folder after you run the level.