diff --git a/Zenitha b/Zenitha
index 4768f9ba..2ad3ab71 160000
--- a/Zenitha
+++ b/Zenitha
@@ -1 +1 @@
-Subproject commit 4768f9bac4ccb3a242cb85b79cbed3beb54b26db
+Subproject commit 2ad3ab715fc6bd5c031f820108ea5a2fea16c88a
diff --git a/assets/game/mechanicLib/brik/allclearGenerator.lua b/assets/game/mechanicLib/brik/allclearGenerator.lua
index a23f9cbe..668db08d 100644
--- a/assets/game/mechanicLib/brik/allclearGenerator.lua
+++ b/assets/game/mechanicLib/brik/allclearGenerator.lua
@@ -165,14 +165,14 @@ local function filterTop(field,pieces)
     end
 end
 local function printField(f)
-    print("--------------------------")
+    local s=STRING.newBuf()
+    s:put("--------------------------")
     for y=#f,1,-1 do
-        local s=""
         for x=1,#f[y] do
-            s=s..(f[y][x] and 'X' or '.')
+            s:put(f[y][x] and "X" or ".")
         end
-        print(s)
     end
+    print(s)
 end
 local function printSeq(s)
     s=TABLE.copy(s,0)
diff --git a/assets/game/mechanicLib/brik/attackSys.lua b/assets/game/mechanicLib/brik/attackSys.lua
index 4c0e1d02..2b2691e3 100644
--- a/assets/game/mechanicLib/brik/attackSys.lua
+++ b/assets/game/mechanicLib/brik/attackSys.lua
@@ -103,22 +103,22 @@ modern={
             end
 
             do -- Text & Sound
-                local t=""
+                local t=STRING.newBuf()
 
                 -- Add CHG text & sound
                 if newCharge>oldCharge then
                     if newCharge>1 then
-                        t=t..Text.charge.." "
+                        t:put(Text.charge.." ")
                         P:playSound('charge',newCharge)
                     end
                 elseif oldCharge-newCharge>=2 then
-                    t=t..Text.charge.." "
+                    t:put(Text.charge.." ")
                     P:playSound('discharge')
                 end
 
                 -- Add spin text & sound
                 if tspin then
-                    t=t..Text.spin:repD(M.brik.name).." "
+                    t:put(Text.spin:repD(M.brik.name).." ")
                     P:playSound('spin',lines)
                 end
 
diff --git a/main.lua b/main.lua
index 35104b52..0d4ab546 100644
--- a/main.lua
+++ b/main.lua
@@ -221,14 +221,21 @@ FONT.load{
 FONT.setDefaultFallback('symbols')
 FONT.setDefaultFont('norm')
 SCR.setSize(1600,1000)
-local bFill=WIDGET.newClass('button_fill','button') do
+do -- WIDGET.newClass
+    local bFill=WIDGET.newClass('button_fill','button')
+    local bInvis=WIDGET.newClass('button_invis','button')
+
     local gc=love.graphics
+    local gc_push,gc_pop=gc.push,gc.pop
+    local gc_translate,gc_scale=gc.translate,gc.scale
+    local gc_setColor=gc.setColor
+    local alignDraw=WIDGET._alignDraw
     function bFill:draw()
-        gc.push('transform')
-        gc.translate(self._x,self._y)
+        gc_push('transform')
+        gc_translate(self._x,self._y)
 
         if self._pressTime>0 then
-            gc.scale(1-self._pressTime/self._pressTimeMax*.0626)
+            gc_scale(1-self._pressTime/self._pressTimeMax*.0626)
         end
 
         local w,h=self.w,self.h
@@ -238,19 +245,43 @@ local bFill=WIDGET.newClass('button_fill','button') do
         local r,g,b=c[1],c[2],c[3]
 
         -- Rectangle
-        gc.setColor(.15+r*.7*(1-HOV*.26),.15+g*.7*(1-HOV*.26),.15+b*.7*(1-HOV*.26),.9)
+        gc_setColor(.15+r*.7*(1-HOV*.26),.15+g*.7*(1-HOV*.26),.15+b*.7*(1-HOV*.26),.9)
+        GC.mRect('fill',0,0,w,h,self.cornerR)
+
+        -- Drawable
+        if self._image then
+            gc_setColor(1,1,1)
+            alignDraw(self,self._image)
+        end
+        if self._text then
+            gc_setColor(self.textColor)
+            alignDraw(self,self._text)
+        end
+        gc_pop()
+    end
+    function bInvis:draw()
+        gc_push('transform')
+        gc_translate(self._x,self._y)
+
+        local w,h=self.w,self.h
+        local HOV=self._hoverTime/self._hoverTimeMax
+
+        local fillC=self.fillColor
+
+        -- Rectangle
+        gc_setColor(fillC[1],fillC[2],fillC[3],HOV*.16)
         GC.mRect('fill',0,0,w,h,self.cornerR)
 
         -- Drawable
         if self._image then
-            gc.setColor(1,1,1)
-            WIDGET._alignDraw(self,self._image)
+            gc_setColor(1,1,1)
+            alignDraw(self,self._image)
         end
         if self._text then
-            gc.setColor(self.textColor)
-            WIDGET._alignDraw(self,self._text)
+            gc_setColor(self.textColor)
+            alignDraw(self,self._text)
         end
-        gc.pop()
+        gc_pop()
     end
 end
 WIDGET.setDefaultOption{