level format json maybe

{
  "Meta":{
    "Name": "level 1",
    "Comment": "demo",
    "Width": 256,
    "Height": 15,
    "Version": 1,
    "GridWidth": 16,
    "GridHeight: 15,
  },

  "Header":{
    "Music": "ATHLETIC",
    "StartX": 5,
    "StartY": 5,
    "SpriteGFX": [
      "SP_WALKER",
      "SP_CANNON",
      "SP_FIRE",
      "SP_KING"
    ],
    "GFXUpload": [
      "PAL_GRASSY",
      "BG_COMMON",
      "BG_GRASSY"
    ],
    "BGColor": 49,
  },

  "Layers": [
    { "Type": "Rectangles",
      "Data": [
        {"Id": "GROUND",   "X", 0, "Y", 13, "W", 20, "H", 2},
        {"Id": "SIGNPOST", "X", 5, "Y", 12, "W", 1, "H", 1},
        {"Id": "GROUND_CLIMB_L", "X", 0, "Y", 13, "W", 1, "H", 1},
        {"Id": "FALLTHROUGH_LEDGE", "X", 8, "Y", 2, "W", 15, "H", 1},
        {"Id": "COIN", "X", 6, "Y", 2, "W", 20, "H", 20}
      ]
    },
    { "Type": "Sprite",
      "Data": [
        {"Id": "GOOMBA", "Left": true, "X":17, "Y":7},
        {"Id": "GOOMBA", "Left": true, "X":37, "Y":11},
        {"Id": "OWL",    "Left": true, "X":56, "Y":12},
        {"Id": "OWL",    "Left": true, "X":66, "Y":8},
        {"Id": "GOOMBA", "Left": true, "X":89, "Y":9},
        {"Id": "OWL",    "Left": true, "X":114,"Y":9},
        {"Id": "OWL",    "Left": true, "X":143,"Y":9},
        {"Id": "GOOMBA", "Left": true, "X":157,"Y":5},
      ]
    }
  ],
}