Tiled Map Editor でタイルに地面フラグを設定しようぜ ref: http://qiita.com/muzudho1/items/1cb926c980b8327f093d

file0.txt

※前略
 "tileheight":32,
 "tilesets":[
        {
         "columns":32,
         "firstgid":1,
         "image":"..\/RunAndJump\/Assets\/Resources\/Sprites\/Textures\/Stage_32x32.png",
         "imageheight":1024,
         "imagewidth":1024,
         "margin":0,
         "name":"\u5404\u7a2e\u8a70\u3081\u5408\u308f\u305b",
         "spacing":0,
         "tilecount":1024,
         "tileheight":32,
         "tileproperties":
            {
             "32":
                {
                 "Collision":true
                },
             "33":
                {
                 "Collision":true
                },
             "34":
                {
                 "Collision":true
                },
             "35":
                {
                 "Collision":true
                }
            },
         "tilepropertytypes":
            {
             "32":
                {
                 "Collision":"bool"
                },
             "33":
                {
                 "Collision":"bool"
                },
             "34":
                {
                 "Collision":"bool"
                },
             "35":
                {
                 "Collision":"bool"
                }
            },
         "tilewidth":32,
         "transparentcolor":"#000000"
        }],
 "tilewidth":32,
 "type":"map",
 "version":"2017.05.26",
 "width":30
}

file1.txt

※前略
 "renderorder":"right-down",
 "tileheight":32,
 "tilesets":[
        {
         "firstgid":1,
         "source":"tileset1.json"
        }],
 "tilewidth":32,
 "type":"map",
 "version":"2017.05.26",
 "width":30
}

file2.txt

{ "columns":32,
 "image":"..\/RunAndJump\/Assets\/Resources\/Sprites\/Textures\/Stage_32x32.png",
 "imageheight":1024,
 "imagewidth":1024,
 "margin":0,
 "name":"\u5404\u7a2e\u8a70\u3081\u5408\u308f\u305b",
 "spacing":0,
 "tilecount":1024,
 "tileheight":32,
 "tileproperties":
    {
     "32":
        {
         "Collision":true
        },
     "33":
        {
         "Collision":true
        },
     "34":
        {
         "Collision":true
        },
     "35":
        {
         "Collision":true
        }
    },
 "tilepropertytypes":
    {
     "32":
        {
         "Collision":"bool"
        },
     "33":
        {
         "Collision":"bool"
        },
     "34":
        {
         "Collision":"bool"
        },
     "35":
        {
         "Collision":"bool"
        }
    },
 "tilewidth":32,
 "transparentcolor":"#000000",
 "type":"tileset"
}