diff --git a/data/spawn_stages.json b/data/spawn_stages.json
index 140cdb0..9dd1fa7 100644
--- a/data/spawn_stages.json
+++ b/data/spawn_stages.json
@@ -1,62 +1,62 @@
 [
   {
-    "time_start": 0,
-    "time_end": 60,
-    "elite_enemy": "res://scenes/slime.tscn",
-    "entries": [
-      { "enemy": "res://scenes/slime.tscn", "count_at_start": 3, "count_at_end": 8, "min_interval": 1.2 }
-    ]
+	"time_start": 0,
+	"time_end": 60,
+	"elite_enemy": "res://scenes/slime.tscn",
+	"entries": [
+	  { "enemy": "res://scenes/slime.tscn", "count_at_start": 3, "count_at_end": 8, "min_interval": 1.2 }
+	]
   },
   {
-    "time_start": 60,
-    "time_end": 90,
-    "elite_enemy": "res://scenes/blue_slime.tscn",
-    "entries": [
-      { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 4, "count_at_end": 7, "min_interval": 1.2 }
-    ]
+	"time_start": 60,
+	"time_end": 90,
+	"elite_enemy": "res://scenes/blue_slime.tscn",
+	"entries": [
+	  { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 4, "count_at_end": 7, "min_interval": 1.2 }
+	]
   },
   {
-    "time_start": 90,
-    "time_end": 180,
-    "elite_enemy": "res://scenes/blue_slime.tscn",
-    "entries": [
-      { "enemy": "res://scenes/slime.tscn",      "count_at_start": 8,  "count_at_end": 15, "min_interval": 0.8 },
-      { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 4,  "count_at_end": 10, "min_interval": 1.0 }
-    ]
+	"time_start": 90,
+	"time_end": 180,
+	"elite_enemy": "res://scenes/blue_slime.tscn",
+	"entries": [
+	  { "enemy": "res://scenes/slime.tscn",      "count_at_start": 8,  "count_at_end": 15, "min_interval": 0.8 },
+	  { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 4,  "count_at_end": 10, "min_interval": 1.0 }
+	]
   },
   {
-    "time_start": 180,
-    "time_end": 210,
-    "elite_enemy": "res://scenes/fire_slime.tscn",
-    "entries": [
-      { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 3, "count_at_end": 5, "min_interval": 1.5 }
-    ]
+	"time_start": 180,
+	"time_end": 210,
+	"elite_enemy": "res://scenes/fire_slime.tscn",
+	"entries": [
+	  { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 3, "count_at_end": 5, "min_interval": 1.5 }
+	]
   },
   {
-    "time_start": 210,
-    "time_end": 300,
-    "elite_enemy": "res://scenes/fire_slime.tscn",
-    "entries": [
-      { "enemy": "res://scenes/slime.tscn",      "count_at_start": 12, "count_at_end": 20, "min_interval": 0.6 },
-      { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 4,  "count_at_end": 10, "min_interval": 1.0 }
-    ]
+	"time_start": 210,
+	"time_end": 300,
+	"elite_enemy": "res://scenes/fire_slime.tscn",
+	"entries": [
+	  { "enemy": "res://scenes/slime.tscn",      "count_at_start": 12, "count_at_end": 20, "min_interval": 0.6 },
+	  { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 4,  "count_at_end": 10, "min_interval": 1.0 }
+	]
   },
   {
-    "time_start": 300,
-    "time_end": 390,
-    "elite_enemy": "res://scenes/fire_slime.tscn",
-    "entries": [
-      { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 10, "count_at_end": 18, "min_interval": 0.7 },
-      { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 8,  "count_at_end": 14, "min_interval": 0.9 }
-    ]
+	"time_start": 300,
+	"time_end": 390,
+	"elite_enemy": "res://scenes/fire_slime.tscn",
+	"entries": [
+	  { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 10, "count_at_end": 18, "min_interval": 0.7 },
+	  { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 8,  "count_at_end": 14, "min_interval": 0.9 }
+	]
   },
   {
-    "time_start": 390,
-    "time_end": -1,
-    "entries": [
-      { "enemy": "res://scenes/slime.tscn",      "count_at_start": 15, "count_at_end": 30, "min_interval": 0.4 },
-      { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 10, "count_at_end": 25, "min_interval": 0.6 },
-      { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 8,  "count_at_end": 20, "min_interval": 0.7 }
-    ]
+	"time_start": 390,
+	"time_end": -1,
+	"entries": [
+	  { "enemy": "res://scenes/slime.tscn",      "count_at_start": 15, "count_at_end": 30, "min_interval": 0.4 },
+	  { "enemy": "res://scenes/blue_slime.tscn", "count_at_start": 10, "count_at_end": 25, "min_interval": 0.6 },
+	  { "enemy": "res://scenes/fire_slime.tscn", "count_at_start": 8,  "count_at_end": 20, "min_interval": 0.7 }
+	]
   }
 ]