diff --git a/main.lua b/main.lua
index b5e037a..0a1a782 100644
--- a/main.lua
+++ b/main.lua
@@ -629,6 +629,30 @@ function love.draw(alpha)
   love.graphics.draw(game.background_image, 0, 0)
   love.graphics.draw(game.background_image, game.background_width, 0)
 
+  -- draw walls
+  love.graphics.setColor(0, 0, 0, 1)
+  love.graphics.rectangle(
+    'line',
+    game.level_left,
+    game.level_top,
+    game.level_width,
+    game.level_height,
+    game.bubble_radius,
+    game.bubble_radius
+  )
+  if game.ceiling_bottom > game.level_top then
+    love.graphics.line(
+      game.level_left,
+      game.ceiling_bottom,
+      game.level_right,
+      game.ceiling_bottom
+    )
+  end
+
+  if game.game_over then
+    love.graphics.setShader(game.shader)
+  end
+
   -- draw stationary bubbles
   love.graphics.setColor(1, 1, 1, 1)
   for i = 1, #game.bubble_slots do
@@ -645,16 +669,6 @@ function love.draw(alpha)
     end
   end
 
-  -- draw walls
-  love.graphics.setColor(0, 0, 0, 1)
-  love.graphics.rectangle(
-    'line',
-    game.level_left,
-    game.ceiling_bottom,
-    game.level_width,
-    game.level_height - game.ceiling_bottom
-  )
-
   -- draw launcher
   love.graphics.setColor(1, 1, 1, 1)
   love.graphics.draw(