diff --git a/pong-1/push.lua b/pong-1/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-1/push.lua
+++ b/pong-1/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-10/main.lua b/pong-10/main.lua
index 6f19e49..f3329bc 100644
--- a/pong-10/main.lua
+++ b/pong-10/main.lua
@@ -255,7 +255,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     love.graphics.setFont(smallFont)
 
diff --git a/pong-10/push.lua b/pong-10/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-10/push.lua
+++ b/pong-10/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-11/main.lua b/pong-11/main.lua
index 58956e1..54d6753 100644
--- a/pong-11/main.lua
+++ b/pong-11/main.lua
@@ -271,7 +271,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     love.graphics.setFont(smallFont)
 
diff --git a/pong-11/push.lua b/pong-11/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-11/push.lua
+++ b/pong-11/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-12/main.lua b/pong-12/main.lua
index b06a998..3198bf2 100644
--- a/pong-12/main.lua
+++ b/pong-12/main.lua
@@ -279,7 +279,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     love.graphics.setFont(smallFont)
 
diff --git a/pong-12/push.lua b/pong-12/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-12/push.lua
+++ b/pong-12/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-2/push.lua b/pong-2/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-2/push.lua
+++ b/pong-2/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-3/main.lua b/pong-3/main.lua
index c4aa3c8..89ea507 100644
--- a/pong-3/main.lua
+++ b/pong-3/main.lua
@@ -114,7 +114,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     -- draw welcome text toward the top of the screen
     love.graphics.setFont(smallFont)
diff --git a/pong-3/push.lua b/pong-3/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-3/push.lua
+++ b/pong-3/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-4/main.lua b/pong-4/main.lua
index 8d8bbcb..ca21850 100644
--- a/pong-4/main.lua
+++ b/pong-4/main.lua
@@ -153,7 +153,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     -- draw different things based on the state of the game
     love.graphics.setFont(smallFont)
diff --git a/pong-4/push.lua b/pong-4/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-4/push.lua
+++ b/pong-4/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-5/main.lua b/pong-5/main.lua
index 62222eb..91328fa 100644
--- a/pong-5/main.lua
+++ b/pong-5/main.lua
@@ -154,7 +154,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     -- draw different things based on the state of the game
     love.graphics.setFont(smallFont)
diff --git a/pong-5/push.lua b/pong-5/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-5/push.lua
+++ b/pong-5/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-6/main.lua b/pong-6/main.lua
index f86f891..8d03505 100644
--- a/pong-6/main.lua
+++ b/pong-6/main.lua
@@ -168,7 +168,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     -- draw different things based on the state of the game
     love.graphics.setFont(smallFont)
diff --git a/pong-6/push.lua b/pong-6/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-6/push.lua
+++ b/pong-6/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-7/main.lua b/pong-7/main.lua
index 0c940ee..f3c2b13 100644
--- a/pong-7/main.lua
+++ b/pong-7/main.lua
@@ -207,7 +207,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     -- draw different things based on the state of the game
     love.graphics.setFont(smallFont)
diff --git a/pong-7/push.lua b/pong-7/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-7/push.lua
+++ b/pong-7/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-8/main.lua b/pong-8/main.lua
index 2d4873f..c25bf1c 100644
--- a/pong-8/main.lua
+++ b/pong-8/main.lua
@@ -223,7 +223,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     -- draw different things based on the state of the game
     love.graphics.setFont(smallFont)
diff --git a/pong-8/push.lua b/pong-8/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-8/push.lua
+++ b/pong-8/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-9/main.lua b/pong-9/main.lua
index d7f1b58..c30f619 100644
--- a/pong-9/main.lua
+++ b/pong-9/main.lua
@@ -226,7 +226,7 @@ function love.draw()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0)
 
     love.graphics.setFont(smallFont)
 
diff --git a/pong-9/push.lua b/pong-9/push.lua
index 0e0709a..026fcb2 100644
--- a/pong-9/push.lua
+++ b/pong-9/push.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h
diff --git a/pong-final/main.lua b/pong-final/main.lua
index c8df5fc..4b085eb 100644
--- a/pong-final/main.lua
+++ b/pong-final/main.lua
@@ -303,7 +303,7 @@ function love.draw()
     -- begin drawing with push, in our virtual resolution
     push:start()
 
-    love.graphics.clear(40, 45, 52, 255)
+    -- love.graphics.clear(40, 45, 52, 0)
     
     -- render different things depending on which part of the game we're in
     if gameState == 'start' then
diff --git a/pong-final/push.lua b/pong-final/push.lua
index 723eb26..c9f2aa8 100644
--- a/pong-final/push.lua
+++ b/pong-final/push.lua
@@ -6,7 +6,7 @@
 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 local love11 = love.getVersion() == 11
-local getDPI = love11 and love.window.getDPIScale or love.window.getPixelScale
+local getDPI = love11 and love.window.getDPIScale or love.window.getDPIScale
 
 local push = {
   
diff --git a/pong-final/push_old.lua b/pong-final/push_old.lua
index 0e0709a..026fcb2 100644
--- a/pong-final/push_old.lua
+++ b/pong-final/push_old.lua
@@ -98,7 +98,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = self._highdpi and love.window.getDPIScale() or 1
   
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -218,7 +218,7 @@ function push:switchFullscreen(winw, winh)
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
+  local pixelScale = love.window.getDPIScale()
   if self._highdpi then w, h = w / pixelScale, h / pixelScale end
   self._RWIDTH = w
   self._RHEIGHT = h