diff --git a/main.json b/main.json
index 59c51a2..50020d2 100644
--- a/main.json
+++ b/main.json
@@ -176,6 +176,24 @@
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          "y":0
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+        {
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+         "height":14,
+         "id":20,
+         "name":"sound",
+         "opacity":1,
+         "properties":[
+                {
+                 "name":"playAudioLoop",
+                 "type":"string",
+                 "value":"Gus_Backus-Bohnen_in_die_Ohrn.mp3"
+                }],
+         "type":"tilelayer",
+         "visible":true,
+         "width":17,
+         "x":0,
+         "y":0
+        }, 
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-         "height":14,
-         "id":5,
+         "draworder":"topdown",
+         "id":21,
          "name":"floorLayer",
+         "objects":[],
          "opacity":1,
-         "type":"tilelayer",
+         "type":"objectgroup",
          "visible":true,
-         "width":17,
          "x":0,
          "y":0
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          "height":14,
-         "id":20,
-         "name":"sound",
+         "id":5,
+         "name":"floorTiles",
          "opacity":1,
-         "properties":[
-                {
-                 "name":"playAudioLoop",
-                 "type":"string",
-                 "value":"Gus_Backus-Bohnen_in_die_Ohrn.mp3"
-                }],
          "type":"tilelayer",
          "visible":true,
          "width":17,
@@ -284,7 +295,7 @@
          "x":0,
          "y":0
         }],
- "nextlayerid":21,
+ "nextlayerid":22,
  "nextobjectid":1,
  "orientation":"orthogonal",
  "renderorder":"right-down",
diff --git a/mueseum.tmx b/mueseum.tmx
index 97a0b93..9f02175 100644
--- a/mueseum.tmx
+++ b/mueseum.tmx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<map version="1.4" tiledversion="1.4.3" orientation="orthogonal" renderorder="right-down" width="17" height="14" tilewidth="32" tileheight="32" infinite="0" nextlayerid="21" nextobjectid="1">
+<map version="1.4" tiledversion="1.4.3" orientation="orthogonal" renderorder="right-down" width="17" height="14" tilewidth="32" tileheight="32" infinite="0" nextlayerid="22" nextobjectid="1">
  <editorsettings>
   <export target="main.json" format="json"/>
  </editorsettings>
@@ -221,6 +221,27 @@
 </data>
   </layer>
  </group>
+ <layer id="20" name="sound" width="17" height="14">
+  <properties>
+   <property name="playAudioLoop" value="Gus_Backus-Bohnen_in_die_Ohrn.mp3"/>
+  </properties>
+  <data encoding="csv">
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+</data>
+ </layer>
  <layer id="11" name="exitURL" width="17" height="14">
   <properties>
    <property name="exitURL" value="{&lt;lobby&gt;/maps/hardware-making.json#start_hardware-hacking-area}"/>
@@ -242,7 +263,8 @@
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 </data>
  </layer>
- <layer id="5" name="floorLayer" width="17" height="14">
+ <objectgroup id="21" name="floorLayer"/>
+ <layer id="5" name="floorTiles" width="17" height="14">
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 0,0,0,0,0,1435,0,0,0,0,0,1435,0,0,0,0,0
-</data>
- </layer>
- <layer id="20" name="sound" width="17" height="14">
-  <properties>
-   <property name="playAudioLoop" value="Gus_Backus-Bohnen_in_die_Ohrn.mp3"/>
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