After rating 30+ games I found a couple of them interpreted the theme like you have one bullet/arrow/bomb that you throw to kill enemies and you have to pick up to use again…

and I honestly believe that it is a better interpretation than mine (one minute to complete the level)…

everything OK so far, until I remembered that I made a game like this three years ago.. and that I forgot about it when thinking about the theme.

This is the game: The Mayan Ball

This is my entry if you want to compare:

… or rate: http://www.ludumdare.com/compo/ludum-dare-28/?action=preview&uid=2085

Best luck to all!!!