We are currently working on a 2D platform game, all lot of the game elements have been created and designed. But now it is time to design all the levels.
What I am wondering is: Are there any tools which simplify level design, we prefer designing in basic wireframes, so no actual graphics yet. It would also be neat if the tool would allow layering specific groups;
I have thought of tools like Visio or Omnigraffle but these aren't specifically meant for game design.