diff --git a/assets/gamefunc.lua b/assets/gamefunc.lua
index bd2f1a9c..e458de63 100644
--- a/assets/gamefunc.lua
+++ b/assets/gamefunc.lua
@@ -158,14 +158,21 @@ function autoQuitInterior(disable)
     end
 end
 
-function saveSettings()
+local function _saveSettings()
+    DEBUG.yieldT(.626)
     FILE.save({
         system=SETTINGS._system,
         game_brik=SETTINGS.game_brik,
         game_gela=SETTINGS.game_gela,
         game_acry=SETTINGS.game_acry,
     },'conf/settings','-json')
-    showSaveIcon(CHAR.icon.settings..CHAR.icon.save)
+    if PROGRESS.get('main')>=3 then
+        showSaveIcon(CHAR.icon.settings..CHAR.icon.save)
+    end
+end
+function saveSettings()
+    TASK.removeTask_code(_saveSettings)
+    TASK.new(_saveSettings)
 end
 function saveKey()
     FILE.save({
diff --git a/assets/language/lang_en.lua b/assets/language/lang_en.lua
index 9bb8f352..ce75fdc2 100644
--- a/assets/language/lang_en.lua
+++ b/assets/language/lang_en.lua
@@ -225,6 +225,24 @@ local L={
         action=           {"Action","Use both keyboard & mouse"},
     },
 
+    -- Mode Task Texts
+    exteriorModeTasks={
+        sequence_mph_title="MPH",
+        sequence_mph_desc="Any clear in 4 pieces",
+        sequence_flood_title="Flood",
+        sequence_flood_desc="Clear with S or Z",
+        sequence_drought_title="Drought",
+        sequence_drought_desc="Clear with J or L",
+        sequence_saw_title="Saw",
+        sequence_saw_desc="Clear with T",
+        sequence_rect_title="Rect",
+        sequence_rect_desc="Clear with O",
+        sequence_rain_title="Rain",
+        sequence_rain_desc="Clear with I",
+        sequence_pento_title="Pento",
+        sequence_pento_desc="Clear with a Pento",
+    },
+
     -- Achievement
     ---@enum (key) Techmino.Text.Achievement
     achievementMessage={
diff --git a/assets/language/lang_zh.lua b/assets/language/lang_zh.lua
index 6aab6d21..e4851089 100644
--- a/assets/language/lang_zh.lua
+++ b/assets/language/lang_zh.lua
@@ -225,6 +225,24 @@ local L={
         action=           {"动作","键鼠搭配更佳"},
     },
 
+    -- Mode Task Texts
+    exteriorModeTasks={
+        sequence_mph_title="MPH",
+        sequence_mph_desc="4块内消除",
+        sequence_flood_title="Flood",
+        sequence_flood_desc="用S/Z消除",
+        sequence_drought_title="Drought",
+        sequence_drought_desc="用J/L消除",
+        sequence_saw_title="Saw",
+        sequence_saw_desc="用T消除",
+        sequence_rect_title="Rect",
+        sequence_rect_desc="用O消除",
+        sequence_rain_title="Rain",
+        sequence_rain_desc="用I消除",
+        sequence_pento_title="Pento",
+        sequence_pento_desc="用五连块消除",
+    },
+
     -- Achievement
     achievementMessage={
         dict_shortcut="快捷键高手",
diff --git a/assets/scene/game_in.lua b/assets/scene/game_in.lua
index 48fef284..936557b0 100644
--- a/assets/scene/game_in.lua
+++ b/assets/scene/game_in.lua
@@ -17,7 +17,7 @@ function scene.load()
     WIDGET._reset()
 end
 function scene.unload()
-    if SCN.state.target~='pause_in' then
+    if SCN.stackChange<0 then
         GAME.unload()
     end
 end
diff --git a/assets/scene/game_out.lua b/assets/scene/game_out.lua
index f716afaf..15c22bb2 100644
--- a/assets/scene/game_out.lua
+++ b/assets/scene/game_out.lua
@@ -21,7 +21,7 @@ function scene.load()
     WIDGET._reset()
 end
 function scene.unload()
-    if SCN.state.target~='pause_out' then
+    if SCN.stackChange<0 then
         GAME.unload()
     end
 end
diff --git a/assets/scene/keyset_in.lua b/assets/scene/keyset_in.lua
index 1dc198fe..af474e2c 100644
--- a/assets/scene/keyset_in.lua
+++ b/assets/scene/keyset_in.lua
@@ -32,7 +32,9 @@ function scene.load()
     end
 end
 function scene.unload()
-    saveKey()
+    if SCN.stackChange<0 then
+        saveKey()
+    end
 end
 
 function scene.mouseDown(_,_,k) if k==2 then SCN.back('none') end end
diff --git a/assets/scene/keyset_out.lua b/assets/scene/keyset_out.lua
index a2f136c1..73669206 100644
--- a/assets/scene/keyset_out.lua
+++ b/assets/scene/keyset_out.lua
@@ -30,7 +30,9 @@ function scene.load()
     WIDGET._reset()
 end
 function scene.unload()
-    saveKey()
+    if SCN.stackChange<0 then
+        saveKey()
+    end
 end
 
 function scene.mouseDown(_,_,k) if k==2 then SCN.back('fadeHeader') end end
diff --git a/assets/scene/keyset_touch_in.lua b/assets/scene/keyset_touch_in.lua
index fb373b7e..7ceea4c3 100644
--- a/assets/scene/keyset_touch_in.lua
+++ b/assets/scene/keyset_touch_in.lua
@@ -7,7 +7,9 @@ function scene.load()
 end
 
 function scene.unload()
-    saveTouch()
+    if SCN.stackChange<0 then
+        saveTouch()
+    end
 end
 
 function scene.keyDown(key,isRep)
diff --git a/assets/scene/lang_in.lua b/assets/scene/lang_in.lua
index cd65a634..5831bdf5 100644
--- a/assets/scene/lang_in.lua
+++ b/assets/scene/lang_in.lua
@@ -25,7 +25,7 @@ function scene.load()
 end
 
 function scene.unload()
-    if changed then
+    if changed and SCN.stackChange<0 then
         saveSettings()
     end
 end
diff --git a/assets/scene/lang_out.lua b/assets/scene/lang_out.lua
index 64aba91f..f8e94493 100644
--- a/assets/scene/lang_out.lua
+++ b/assets/scene/lang_out.lua
@@ -25,7 +25,7 @@ function scene.load()
     changed=false
 end
 function scene.unload()
-    if changed then
+    if changed and SCN.stackChange<0 then
         saveSettings()
     end
 end
diff --git a/assets/scene/pause_in.lua b/assets/scene/pause_in.lua
index a1d3d27c..26123e9a 100644
--- a/assets/scene/pause_in.lua
+++ b/assets/scene/pause_in.lua
@@ -16,7 +16,7 @@ function scene.load()
 end
 function scene.unload()
     FMOD.effect.keyOff('music_pause')
-    if not (SCN.state.target=='setting_in' or SCN.state.target=='game_in') then
+    if SCN.stackChange<0 then
         GAME.unload()
     end
 end
diff --git a/assets/scene/pause_out.lua b/assets/scene/pause_out.lua
index 6638e74e..af68bb23 100644
--- a/assets/scene/pause_out.lua
+++ b/assets/scene/pause_out.lua
@@ -20,7 +20,7 @@ function scene.load()
 end
 function scene.unload()
     FMOD.effect.keyOff('music_pause')
-    if not (SCN.state.target=='setting_out' or SCN.state.target=='game_out') then
+    if SCN.stackChange<0 then
         GAME.unload()
     end
 end
diff --git a/assets/scene/setting_in.lua b/assets/scene/setting_in.lua
index 3452168d..1c113311 100644
--- a/assets/scene/setting_in.lua
+++ b/assets/scene/setting_in.lua
@@ -7,7 +7,9 @@ function scene.load()
     settingHint=PROGRESS.get('main')<2 and PROGRESS.get('launchCount')<=3
 end
 function scene.unload()
-    saveSettings()
+    if SCN.stackChange<0 then
+        saveSettings()
+    end
 end
 
 function scene.mouseDown(_,_,k) if k==2 then SCN.back('none') end end
diff --git a/assets/scene/setting_out.lua b/assets/scene/setting_out.lua
index 27d4de5e..4b752701 100644
--- a/assets/scene/setting_out.lua
+++ b/assets/scene/setting_out.lua
@@ -27,7 +27,9 @@ function scene.load()
     BG.set('none')
 end
 function scene.unload()
-    saveSettings()
+    if SCN.stackChange<0 then
+        saveSettings()
+    end
 end
 
 function scene.mouseDown(_,_,k) if k==2 then SCN.back('fadeHeader') end end
diff --git a/assets/scene/zeta_input_method.lua b/assets/scene/zeta_input_method.lua
index 175dc49a..488b4d4b 100644
--- a/assets/scene/zeta_input_method.lua
+++ b/assets/scene/zeta_input_method.lua
@@ -177,6 +177,11 @@ function scene.load()
     freshWidgetPos()
     freshResult()
 end
+function scene.unload()
+    inputs=nil
+    results=nil
+    charQueue=nil
+end
 
 function scene.mouseDown(x,y,k)
     if k==1 and not writing then