diff --git a/main.lua b/main.lua
index e2a52e2..3b88d88 100644
--- a/main.lua
+++ b/main.lua
@@ -145,13 +145,13 @@ function love.load(arg)
   game.bubble_slots = load_level(
     game.levels[game.current_level], game.bubble_diameter, game.row_gap
   )
-  local bubbles_wide = math.max(
+  local max_cols = math.max(
     #game.levels[game.current_level][1],
     #game.levels[game.current_level][2]
   )
-  local bubbles_high = #game.levels[game.current_level]
-  game.level_width = bubbles_wide * game.bubble_diameter
-  game.level_height = (bubbles_high - 1) * game.row_gap + game.bubble_diameter
+  local num_rows = #game.levels[game.current_level]
+  game.level_width = max_cols * game.bubble_diameter
+  game.level_height = (num_rows - 1) * game.row_gap + game.bubble_diameter
   game.level_left = (game.window_width - game.level_width) / 2
   game.level_top = game.bubble_radius
   game.level_right = game.level_left + game.level_width