diff --git a/src/activities/play_rhythm/resource/dataset.json b/src/activities/play_rhythm/resource/dataset.json
index c0fb0a59f..26e7cd06e 100644
--- a/src/activities/play_rhythm/resource/dataset.json
+++ b/src/activities/play_rhythm/resource/dataset.json
@@ -1,85 +1,85 @@
 {
 	"levels": [
 		{
 			"pulseMarkerVisible": true,
 			"metronomeVisible": false,
 			"melodies": [
-                "Treble C4Quarter C4Eighth C4Half",
-                "Treble C4Quarter C4Eighth C4Eighth",
-                "Treble C4Quarter C4Quarter C4Half"
-            ]
+    			"Treble C4Quarter C4Eighth C4Half",
+    			"Treble C4Quarter C4Eighth C4Eighth",
+    			"Treble C4Quarter C4Quarter C4Half"
+			]
 		},
 		{
 			"pulseMarkerVisible": false,
 			"metronomeVisible": true,
 			"melodies": [
-                "Treble C4Quarter C4Half C4Eighth",
-                "Treble C4Quarter C4Quarter C4Quarter",
-                "Treble C4Eighth C4Quarter C4Quarter"
-            ]
+    			"Treble C4Quarter C4Half C4Eighth",
+    			"Treble C4Quarter C4Quarter C4Quarter",
+    			"Treble C4Eighth C4Quarter C4Quarter"
+			]
 		},
 		{
 			"pulseMarkerVisible": true,
 			"metronomeVisible": false,
 			"melodies": [
-                "Treble C4Quarter C4Eighth C4Half",
-                "Treble C4Quarter C4Half C4Quarter",
-                "Treble C4Quarter C4Quarter C4Eighth"
-            ]
+    			"Treble C4Quarter C4Eighth C4Half",
+    			"Treble C4Quarter C4Half C4Quarter",
+    			"Treble C4Quarter C4Quarter C4Eighth"
+			]
 		},
 		{
 			"pulseMarkerVisible": false,
 			"metronomeVisible": true,
 			"melodies": [
-                "Treble C4Eighth C4Quarter C4Eighth",
-                "Treble C4Quarter C4Eighth C4Half",
-                "Treble C4Eighth C4Quarter C4Half"
-            ]
+    			"Treble C4Eighth C4Quarter C4Eighth",
+    			"Treble C4Quarter C4Eighth C4Half",
+    			"Treble C4Eighth C4Quarter C4Half"
+			]
 		},
 		{
 			"pulseMarkerVisible": true,
 			"metronomeVisible": false,
 			"melodies": [
-                "Treble C4Eighth C4Eighth C4Quarter C4Eighth",
-                "Treble C4Quarter C4Quarter C4Half C4Eighth",
-                "Treble C4Half C4Eighth C4Eighth C4Quarter"
-            ]
+    			"Treble C4Eighth C4Eighth C4Quarter C4Eighth",
+    			"Treble C4Quarter C4Quarter C4Half C4Eighth",
+    			"Treble C4Half C4Eighth C4Eighth C4Quarter"
+			]
 		},
 		{
 			"pulseMarkerVisible": false,
 			"metronomeVisible": true,
 			"melodies": [
-                "Treble C4Quarter C4Quarter C4Quarter C4Quarter",
-                "Treble C4Eighth C4Quarter C4Half C4Eighth",
-                "Treble C4Eighth C4Half C4Eighth C4Eighth"
-            ]
+    			"Treble C4Quarter C4Quarter C4Quarter C4Quarter",
+    			"Treble C4Eighth C4Quarter C4Half C4Eighth",
+    			"Treble C4Eighth C4Half C4Eighth C4Eighth"
+			]
 		},
 		{
 			"pulseMarkerVisible": true,
 			"metronomeVisible": false,
-			"melodies":[
-                "Treble C4Eighth C4Quarter C4Quarter C4Quarter",
-                "Treble C4Eighth C4Eighth C4Eighth C4Eighth",
-                "Treble C4Quarter C4Half C4Quarter C4Eighth"
-            ]
+			"melodies": [
+    			"Treble C4Eighth C4Quarter C4Quarter C4Quarter",
+    			"Treble C4Eighth C4Eighth C4Eighth C4Eighth",
+    			"Treble C4Quarter C4Half C4Quarter C4Eighth"
+			]
 		},
 		{
 			"pulseMarkerVisible": false,
 			"metronomeVisible": true,
 			"melodies": [
-                "Treble C4Eighth C4Quarter C4Eighth C4Quarter",
-                "Treble C4Quarter C4Half C4Eighth C4Eighth",
-                "Treble C4Quarter C4Eighth C4Quarter C4Eighth"
-            ]
+    			"Treble C4Eighth C4Quarter C4Eighth C4Quarter",
+    			"Treble C4Quarter C4Half C4Eighth C4Eighth",
+    			"Treble C4Quarter C4Eighth C4Quarter C4Eighth"
+			]
 		},
 		{
 			"pulseMarkerVisible": true,
 			"metronomeVisible": false,
 			"melodies": [
-                "Treble C4Quarter C4Quarter C4Half C4Eighth",
-                "Treble C4Eighth C4Eighth C4Eighth C4Quarter",
-                "Treble C4Quarter C4Eighth C4Quarter C4Eighth"
-            ]
+    			"Treble C4Quarter C4Quarter C4Half C4Eighth",
+    			"Treble C4Eighth C4Eighth C4Eighth C4Quarter",
+    			"Treble C4Quarter C4Eighth C4Quarter C4Eighth"
+			]
 		}
     ]
 }