When you start up the game, press the F11 key. The debug panel shows positions, visible entities, and many other useful things that can help. As for taking the screenshots, just upload the PNG, or JPG file to some place like imageshack or photobucket.
"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip
My 2D game - release on Jun 13th; My tutorials
