diff --git a/code/chunk.lua b/code/chunk.lua
new file mode 100644
index 0000000..d503bb0
--- /dev/null
+++ b/code/chunk.lua
@@ -0,0 +1,7 @@
+-- pieces of levels
+
+Chunk = {}
+Chunk.__index = Chunk
+
+function Chunk:new(file, rect)
+end
diff --git a/code/editor.lua b/code/editor.lua
index 11e45da..03d047e 100644
--- a/code/editor.lua
+++ b/code/editor.lua
@@ -100,7 +100,7 @@ function stepEditor()
 					if name_prompt.canceled then return end
 					Prompt:new({
 							name = "filename",
-							input = "level.lua",
+							input = "unnamed_level",
 							func = function(file_prompt)
 								if file_prompt.canceled then return end
 								exportLevel(name_prompt.input, file_prompt.input)
diff --git a/code/in_out.lua b/code/in_out.lua
index b8586d1..891c1b6 100644
--- a/code/in_out.lua
+++ b/code/in_out.lua
@@ -1,90 +1,37 @@
-function exportLevel(levelname, filename)
-	love.filesystem.createDirectory("export")
-	filename = filename or "output.lua"
-	if string.sub(filename, 1, 1) ~= "/" then
-		filename = "export/"..filename
+function exportLevel(levelname, dirname)
+	dirname = "export/"..dirname
+	
+	local ok = love.filesystem.createDirectory(dirname)
+	if not ok then
+		logPrint("error creating directory")
 	end
-	exportFile = io.open(filename, "w+")
 
-	if exportFile then
-		logPrint("Exporting level \"".. levelname .. "\"...")
-		exportFile:write("return {")
 
-			logPrint("- level name")
-			exportFile:write("\n	name = \"" .. levelname .. "\",")
-
-			logPrint("- tileset")
-			for k, v in pairs(tileset) do
-				if v == LevelData.tileset then
-					exportFile:write("\n	tileset = tileset." .. k .. ",")
-				end
-			end
-
-			logPrint("- properties")
-			exportFile:write("\n	properties = {")
-			logPrint(" - darkness: ".. tostring(LevelData.properties.darkness))
-			exportFile:write("\n		darkness = " .. tostring(LevelData.properties.darkness))
-			exportFile:write("\n	},")
-
-			logPrint("- tiles")
-			exportFile:write("\n	tiles = {")
-			local rows = #LevelTiles
-			for i = 1, #LevelTiles do
-				if i > 1 then
-						exportFile:write(", ")
-				end
-				exportFile:write("\n		{ ")
-				for j = 1, #LevelTiles[i] do
-					if j ~= 1 then
-						exportFile:write(", ")
-					end
-					exportFile:write(tostring(LevelTiles[i][j].id))
-				end
-				exportFile:write("}")
-				logPrint(" - row "..i.."/"..rows.." "..math.floor(100*((i-1)*100/rows))/100 .."%")
-			end
-			exportFile:write("\n	},")
-			logPrint("- objects")
-			exportFile:write("\n	objects = {")
-				logPrint(" - spawns")
-				exportFile:write("\n		spawns = {")
-				for i, v in ipairs(LoadedObjects.Spawns) do
-					if i > 1 then
-						exportFile:write(",")
-					end
-					exportFile:write("\n			{")
-					exportFile:write(v.archetype.type)
-					exportFile:write(",{")
-					for i=1, #v.args do
-						if i > 1 then
-							exportFile:write(",")
-						end
-						exportFile:write(v.args[i])
-					end
-					exportFile:write("}}")
-				end
-				exportFile:write("\n		},")
-				logPrint(" - rooms")
-				exportFile:write("\n		rooms = {")
-				for i, room in ipairs(LoadedObjects.Rooms) do
-					if i > 1 then
-						exportFile:write(",")
-					end
-					exportFile:write("\n			{{")
-					exportFile:write(room.from.x)
-					exportFile:write(",")
-					exportFile:write(room.from.y)
-					exportFile:write("},{")
-					exportFile:write(room.to.x)
-					exportFile:write(",")
-					exportFile:write(room.to.y)
-					exportFile:write("}}")
-				end
-				exportFile:write("\n		},")
-			exportFile:write("\n	},")
-			logPrint("Exporting complete.")
-		exportFile:write("\n}")
-		exportFile:close()
+	logPrint("Exporting level \"".. levelname .. "\"...")
+	local exportTable = {}
+	exportTable.name = levelname
+	exportTable.tileset = "library"
+	exportTable.properties = LevelData.properties
+	exportTable.tiles = LevelTiles
+	logPrint("- objects")
+	exportTable.objects = { spawns = {}, rooms = {} }
+	logPrint(" - spawns")
+	for i, v in ipairs(LoadedObjects.Spawns) do
+		exportTable.objects.spawns = {v.archetype.name,{},v.args}
+	end
+	
+	logPrint(" - rooms")
+		
+	for i, room in ipairs(LoadedObjects.Rooms) do
+		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))
+	if ok then
+		logPrint("Exporting complete.")
+	else
+		logPrint("Exporting failed: "..err)
 	end
 end