LÖVE

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local tile = layer.data[8+1][5+1]

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-- x, y is the tile location of the door
  local layer = tilemap.map.layers['Door'] -- Layer containing door tiles
  local tile = layer.data[y+1][x+1] -- Tile data for the door we're interacting with
  local door_closed = 357 -- GID for closed door image
  local door_open = 358 -- GID for open door image

  local instance = false
  local px, py = tilemap.map:convertTileToPixel(x, y) -- get exact x and y of tile.
  for _, ti in pairs(tilemap.map.tileInstances[tile.gid]) do
    -- Search through tileInstances by our specified tile GID
    if ti.x == px and ti.y == py then -- if instance matches tile location
      instance = ti
      break
    end
  end

  -- if instance is not nil or false from before
  if instance ~= false then
    -- handle which image to show
    if door.closed then
      door.closed = false -- door is closed, lets open it
      local new_tile = tilemap.map.tiles[door_open] -- opened door tile
      instance.batch:set(instance.id, new_tile.quad, instance.x, instance.y)
    elseif not door.closed then
      door.closed = true -- door is open, let's close it
      local new_tile = tilemap.map.tiles[door_closed] -- closed door tile
      instance.batch:set(instance.id, new_tile.quad, instance.x, instance.y)
    end
  end

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instance.batch:set(instance, quad, x, y)

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local sti = require "sti"

function love.load()
  --Load map file
  map = sti("res/map/map.lua")
  
  --Create new dynamic data layer called "Sprites" as the 2nd layer
  local layer = map:addCustomLayer("Sprites", 2)
  
 --Error is in this chunk, lets figure it out shall we? 
  --Get player spawn object
  local player
	for k, object in pairs(map.objects) do
		if object.name == "Player" then
			player = object
			break
		end
	end

  --Create player object
  local sprite = love.graphics.newImage("res/img/sprite.bmp")
  layer.player = {
    sprite = sprite,
    x      = player.x,
    y      = player.y,
    ox     = sprite:getWidth() / 2,
    oy     = sprite:getHeight() / 1.35
  }
  
  --Draw player
  layer.draw = function(self)
    love.graphics.draw(
      self.player.sprite,
      math.floor(self.player.x),
      math.floor(self.player.y),
      0,
      1,
      1,
      self.player.ox,
      self.player.oy
    )
    
    --Temporarily draw a point at our location so we know
    --That our sprite is offset properly
    love.graphics.setPointSize(5)
    love.graphics.points(math.floor(self.player.x), math.floor(self.player.y))
  end
  
  --Remove unneeded object layer
  map:removeLayer("Spawn Point")
end

function love.update(dt)
  --Update world
  map:update(dt)
end

function love.draw()
  --Draw world
  map:draw()
end