diff --git a/CHANGELOG.md b/CHANGELOG.md
index 807c534..11a6ff4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,6 +49,7 @@ Other Game Changes:
 - Various biomes now use normal grass
 - Added Mossy Cobblestone
 - Added Boulders
+- Mushroom biomes are now marked as lowlands, only going up to Y 10
 
 Code Changes:
 
diff --git a/minetest.conf b/minetest.conf
index 61f5cdd..e39028b 100644
--- a/minetest.conf
+++ b/minetest.conf
@@ -1,3 +1,10 @@
+# Nodelands options
+always_day = false
+fire_spreads = true
+acid_spreads = true
+explosion_damage = true
+
+# other options
 unified_inventory_lite = false
 unified_inventory_bags = false
 unified_inventory_waypoints = false
diff --git a/mods/WORLD/pyutest_overworld/biomes.lua b/mods/WORLD/pyutest_overworld/biomes.lua
index 1b4d9c4..45e0c78 100644
--- a/mods/WORLD/pyutest_overworld/biomes.lua
+++ b/mods/WORLD/pyutest_overworld/biomes.lua
@@ -1,18 +1,3 @@
-if PyuTest.is_flat() then
-  PyuTest.register_overworld_biome("flat", PyuTest.BIOME_TYPES.NORMAL, {
-    node_top = "pyutest_grass:grass_block",
-    node_filler = "pyutest_blocks:dirt_block",
-
-    y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
-    y_min = PyuTest.OVERWORLD_BOTTOM,
-
-    heat_point = 50,
-    humidity_point = 50,
-  })
-
-  return
-end
-
 -- "Just right"
 PyuTest.register_overworld_biome("Plains", PyuTest.BIOME_TYPES.NORMAL, {
   node_top = "pyutest_grass:grass_block",
@@ -147,7 +132,7 @@ PyuTest.register_overworld_biome("MushroomFields", PyuTest.BIOME_TYPES.NORMAL, {
   node_top = "pyutest_blocks:mycelium_block",
   node_filler = "pyutest_blocks:dirt_block",
 
-  y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.lowland,
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 30,
@@ -163,7 +148,7 @@ PyuTest.register_overworld_biome("LargeMushroomForest", PyuTest.BIOME_TYPES.NORM
   node_top = "pyutest_blocks:mycelium_block",
   node_filler = "pyutest_blocks:dirt_block",
 
-  y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.lowland,
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 30,
@@ -252,7 +237,7 @@ PyuTest.register_overworld_biome("RedwoodForest", PyuTest.BIOME_TYPES.CHILLY, {
   _pyutest_fog_distance = 60,
 })
 
--- STUPID COLD, CANADA LEVELS OF COLD
+-- Winter
 PyuTest.register_overworld_biome("FrozenPlains", PyuTest.BIOME_TYPES.COLD, {
   node_dust = "pyutest_blocks:snow_carpet",
   node_top = "pyutest_blocks:snow_block",
@@ -305,7 +290,24 @@ PyuTest.register_overworld_biome("IceSpikes", PyuTest.BIOME_TYPES.COLD, {
   _enable_beaches = false
 })
 
--- Peaks and mountains regardless of temperature
+-- Mountains
+PyuTest.register_overworld_biome("StonyPeaks", PyuTest.BIOME_TYPES.CHILLY, {
+  depth_top = 0,
+  depth_filler = 0,
+
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.elevated,
+  y_min = PyuTest.OVERWORLD_BIOME_TOPS.normal,
+
+  heat_point = 20,
+  humidity_point = 30,
+
+  vertical_blend = 8,
+
+  weight = PyuTest.BIOME_WEIGHTS.large,
+
+  _enable_beaches = false
+})
+
 PyuTest.register_overworld_biome("FrozenPeaks", PyuTest.BIOME_TYPES.COLD, {
   node_top = "pyutest_blocks:snow_block",
   node_filler = "pyutest_blocks:ice_block",
@@ -341,23 +343,6 @@ PyuTest.register_overworld_biome("JaggedPeaks", PyuTest.BIOME_TYPES.COLD, {
   _enable_beaches = false
 })
 
-PyuTest.register_overworld_biome("StonyPeaks", PyuTest.BIOME_TYPES.CHILLY, {
-  depth_top = 0,
-  depth_filler = 0,
-
-  y_max = PyuTest.OVERWORLD_BIOME_TOPS.elevated,
-  y_min = PyuTest.OVERWORLD_BIOME_TOPS.normal,
-
-  heat_point = 20,
-  humidity_point = 30,
-
-  vertical_blend = 8,
-
-  weight = PyuTest.BIOME_WEIGHTS.large,
-
-  _enable_beaches = false
-})
-
 PyuTest.register_overworld_biome("Grove", PyuTest.BIOME_TYPES.COLD, {
   node_top = "pyutest_blocks:snow_block",
   node_filler = "pyutest_blocks:dirt_block",
diff --git a/mods/WORLD/pyutest_overworld/init.lua b/mods/WORLD/pyutest_overworld/init.lua
index 2c43dfa..80a153f 100644
--- a/mods/WORLD/pyutest_overworld/init.lua
+++ b/mods/WORLD/pyutest_overworld/init.lua
@@ -1,11 +1,23 @@
 local modpath = core.get_modpath("pyutest_overworld")
 
-dofile(modpath .. "/biomes.lua")
+if PyuTest.is_flat() then
+  PyuTest.register_overworld_biome("flat", PyuTest.BIOME_TYPES.NORMAL, {
+    node_top = "pyutest_grass:grass_block",
+    node_filler = "pyutest_blocks:dirt_block",
 
-if not PyuTest.is_flat() then
-  dofile(modpath .. "/caves.lua")
-  dofile(modpath .. "/features.lua")
-  dofile(modpath .. "/structures.lua")
-  dofile(modpath .. "/trees.lua")
-  dofile(modpath .. "/flowers.lua")
+    y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
+    y_min = PyuTest.OVERWORLD_BOTTOM,
+
+    heat_point = 50,
+    humidity_point = 50,
+  })
+
+  return
 end
+
+dofile(modpath .. "/biomes.lua")
+dofile(modpath .. "/caves.lua")
+dofile(modpath .. "/features.lua")
+dofile(modpath .. "/structures.lua")
+dofile(modpath .. "/trees.lua")
+dofile(modpath .. "/flowers.lua")