diff --git a/code/gameworld.lua b/code/gameworld.lua
index e8c6d34..c252b72 100644
--- a/code/gameworld.lua
+++ b/code/gameworld.lua
@@ -20,7 +20,6 @@ function drawGameworldBackground()
 	for i = 1, #LevelTiles do
 		for j = 1, #LevelTiles[i] do
 			if LevelTiles[i][j].id ~= 0 then
-
 				local depth = TileData[LevelTiles[i][j].id].depth
 				drawTile(
 					LevelTiles[i][j],
diff --git a/code/in_out.lua b/code/in_out.lua
index 891c1b6..895ccee 100644
--- a/code/in_out.lua
+++ b/code/in_out.lua
@@ -1,5 +1,10 @@
 function exportLevel(levelname, dirname)
 	dirname = "export/"..dirname
+
+	if love.filesystem.exists(dirname) then
+		-- TODO: prompt to overwrite
+		error("file already exists")
+	end
 	
 	local ok = love.filesystem.createDirectory(dirname)
 	if not ok then
@@ -17,7 +22,7 @@ function exportLevel(levelname, dirname)
 	exportTable.objects = { spawns = {}, rooms = {} }
 	logPrint(" - spawns")
 	for i, v in ipairs(LoadedObjects.Spawns) do
-		exportTable.objects.spawns = {v.archetype.name,{},v.args}
+		--exportTable.objects.spawns = {v.archetype.name,{},v.args}
 	end
 	
 	logPrint(" - rooms")
@@ -26,8 +31,7 @@ function exportLevel(levelname, dirname)
 		table.insert(exportTable.objects.rooms,{room:asRect():getCoords()})
 	end
 	logPrint("Writing to file...")
-	-- FIXME: serialize_lua_table isn't real...
-	local ok, err = love.filesystem.write(dirname.."/level.bin", serialize_lua_table("string", "", exportTable))
+	local ok, err = love.filesystem.write(dirname.."/level.lua", "return "..serialize_lua_value(exportTable))
 	if ok then
 		logPrint("Exporting complete.")
 	else
diff --git a/code/level.lua b/code/level.lua
index 5995b50..315104e 100644
--- a/code/level.lua
+++ b/code/level.lua
@@ -1,6 +1,11 @@
 function loadLevelTiles()
 	math.randomseed(3)
-	LevelData = dofile("data/levels/"..level_current)
+	LevelData = dofile( love.filesystem.getSaveDirectory().."/export/unnamed_level/level.lua")
+	if type(LevelData.tileset) == "string" then
+		LevelData.tileset_name = LevelData.tileset
+	end
+	LevelData.tileset = tileset[LevelData.tileset_name]
+		--dofile("data/levels/"..level_current)
 
 	--[[
 		on level format:
@@ -24,14 +29,14 @@ end
 function createRoomObjects()
 	LoadedObjects.Rooms = {}
 	for _, v in pairs(LevelData.objects.rooms) do
-		table.insert(LoadedObjects.Rooms, Collision:new(v[1][1],v[1][2],v[2][1],v[2][2]))
+		table.insert(LoadedObjects.Rooms, Collision:new(v[1],v[2],v[3],v[4]))
 	end
 end
 
 function getSpawns()
 	LoadedObjects.Spawns = {}
 	for _, v in pairs(LevelData.objects.spawns) do
-		addSpawn(v[1],unpack(v[2]))
+		--addSpawn(v[1],unpack(v[2]))
 	end
 end
 
@@ -121,11 +126,8 @@ function reduceLevelCanvas(horizontal,vertical)
 end
 
 function getLevelTileData()
-	for k, v in pairs(tileset) do
-		if v == LevelData.tileset then
-			TileData = dofile("data/tileset/"..k..".lua")
-		end
-	end
+	TileData = dofile("data/tileset/"..LevelData.tileset_name..".lua")
+	
 end
 
 function reloadLevelTiles()
@@ -159,10 +161,10 @@ end
 
 function indexLevelTiles()
 	TileIndex = {}
-
+	local this_tileset = LevelData.tileset
 	-- index from tileset
-	local width = LevelData.tileset:getPixelWidth()/tile_properties.width
-	local height = LevelData.tileset:getPixelHeight()/tile_properties.height
+	local width = this_tileset:getPixelWidth()/tile_properties.width
+	local height = this_tileset:getPixelHeight()/tile_properties.height
 	for i = 0, height do
 		for j = 0, width do
 			TileIndex[i*width+j+1] = love.graphics.newQuad(
@@ -170,7 +172,7 @@ function indexLevelTiles()
 														i*tile_properties.height,
 														tile_properties.width,
 														tile_properties.height,
-														LevelData.tileset:getDimensions()
+														this_tileset:getDimensions()
 													)
 		end
 	end
@@ -220,6 +222,9 @@ end
 function instanceTile(id)
 	local tile = {}
 
+	if type(id) == "table" then
+		id = id.id
+	end
 	tile.id = id
 	local Properties = TileData[tile.id]
 
@@ -270,8 +275,9 @@ function optimizeTileObjects()
 	end
 	for i = 1, #LevelTiles do
 		for j = 1, #LevelTiles[i] do
-			if LevelTiles[i][j].id ~= 0 then
-				local type = TileData[LevelTiles[i][j].id].type
+			if LevelTiles[i][j].id ~= 0 and TileData[LevelTiles[i][j].id] then
+				local tile_dat =  TileData[LevelTiles[i][j].id]
+				local type = tile_dat.type
 				if type == "whole" and not isTileOptimized[i][j] then
 					isTileOptimized[i][j] = true
 					local n = 1
@@ -357,9 +363,9 @@ function createTileObjects()
 	for i = 1, #LevelTiles do
 		for j = 1, #LevelTiles[i] do
 			if LevelTiles[i][j].id ~= 0 then
-
-				local type = TileData[LevelTiles[i][j].id].type
-				local light = TileData[LevelTiles[i][j].id].light
+				local tile_dat = TileData[LevelTiles[i][j].id] or {}
+				local type = tile_dat.type
+				local light = tile_dat.light
 				local base_x = tile_properties.scale * j * tile_properties.width + tile_properties.scale * (level_properties.offset.x - tile_properties.height)
 				local base_y = tile_properties.scale * i * tile_properties.height + tile_properties.scale * (level_properties.offset.y - tile_properties.height)
 
diff --git a/code/require.lua b/code/require.lua
index d4b8390..9b42641 100644
--- a/code/require.lua
+++ b/code/require.lua
@@ -7,6 +7,7 @@ require "data/sfx"
 require "code/locale"
 
 -- support functions
+require "code/serialize"
 require "code/math"
 require "code/draw"
 require "code/hex"