return {
  name = "level1",
  tileset = tileset.library,
  tiles = {
    {13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13},
    { },
    { 0, 0, 0, 0, 0, 0, 5,25,26, 6,25,26, 7, 0, 5,25,26, 7},
    { 0, 0, 0, 0, 0, 0, 5,37,38, 6,37,38, 7, 0, 5,37,38, 7},
    { 0, 0, 0, 0, 0, 0, 5,37,38, 6,37,38, 7, 0, 5,37,38, 7},
    { 0, 0, 0, 0, 0, 0, 5,49,50, 6,49,50, 7, 0, 5,49,50, 7},
    { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}
  },
  objects = {}
}