Added numbers to main menu.  Fixed debug restart.  Added green goal prefabs to main menu.
Added all win/lose logic to level 1.  Created fall death trigger prefab. Added more gui text.
Added win/lose logic to level 2.  Added GUI prefab for text.
Added win/lose logic to level 3.
Merge pull request #36 from bbrouse/bbrouse_issue_7

Added win/lose logic to levels.