diff --git a/inc/init/init.context.lua b/inc/init/init.context.lua
index 6c095ae..9579296 100644
--- a/inc/init/init.context.lua
+++ b/inc/init/init.context.lua
@@ -99,15 +99,15 @@ function Context.new_game()
   MysteriousManScreen.start({
     text = [[
       Norman was never a bad
-      
+
       simulation engineer,
-      
+
       but
-      
+
       we need to be careful
-      
+
       letting him improve.
-      
+
       We need to distract him.
     ]],
     on_text_complete = function()
diff --git a/inc/system/system.ui.lua b/inc/system/system.ui.lua
index 9626b52..87f70c3 100644
--- a/inc/system/system.ui.lua
+++ b/inc/system/system.ui.lua
@@ -90,45 +90,45 @@ end
 --- @param[opt] bg_color number The background fill color (default: Config.colors.dark_grey).<br/>
 --- @param[opt] border_color number The border color (default: Config.colors.white).<br/>
 --- @param[opt] center_text boolean Whether to center each line inside the box. Defaults to false.<br/>
-local function draw_rounded_rect_fill(x, y, w, h, radius, color)
-  local inner_w = w - radius * 2
-  local inner_h = h - radius * 2
+local function draw_rounded_rect_fill(x, y, w, h, corner_radius, color)
+  local inner_w = w - corner_radius * 2
+  local inner_h = h - corner_radius * 2
   if inner_w > 0 and inner_h > 0 then
-    rect(x + radius, y + radius, inner_w, inner_h, color)
+    rect(x + corner_radius, y + corner_radius, inner_w, inner_h, color)
   end
-  if inner_w > 0 and radius > 0 then
-    rect(x + radius, y, inner_w, radius, color)
-    rect(x + radius, y + h - radius, inner_w, radius, color)
+  if inner_w > 0 and corner_radius > 0 then
+    rect(x + corner_radius, y, inner_w, corner_radius, color)
+    rect(x + corner_radius, y + h - corner_radius, inner_w, corner_radius, color)
   end
-  if radius > 0 and inner_h > 0 then
-    rect(x, y + radius, radius, inner_h, color)
-    rect(x + w - radius, y + radius, radius, inner_h, color)
+  if corner_radius > 0 and inner_h > 0 then
+    rect(x, y + corner_radius, corner_radius, inner_h, color)
+    rect(x + w - corner_radius, y + corner_radius, corner_radius, inner_h, color)
   end
-  for row = 0, radius - 1 do
-    for col = 0, radius - 1 do
-      if col + row >= radius - 1 then
-        pix(x + radius - 1 - col, y + radius - 1 - row, color)
-        pix(x + w - radius + col, y + radius - 1 - row, color)
-        pix(x + radius - 1 - col, y + h - radius + row, color)
-        pix(x + w - radius + col, y + h - radius + row, color)
+  for row = 0, corner_radius - 1 do
+    for col = 0, corner_radius - 1 do
+      if col + row >= corner_radius - 1 then
+        pix(x + corner_radius - 1 - col, y + corner_radius - 1 - row, color)
+        pix(x + w - corner_radius + col, y + corner_radius - 1 - row, color)
+        pix(x + corner_radius - 1 - col, y + h - corner_radius + row, color)
+        pix(x + w - corner_radius + col, y + h - corner_radius + row, color)
       end
     end
   end
 end
 
-local function draw_rounded_rect_border(x, y, w, h, radius, color)
-  line(x + radius, y, x + w - radius - 1, y, color)
-  line(x + radius, y + h - 1, x + w - radius - 1, y + h - 1, color)
-  line(x, y + radius, x, y + h - radius - 1, color)
-  line(x + w - 1, y + radius, x + w - 1, y + h - radius - 1, color)
-  pix(x + radius - 1, y + 1, color)
-  pix(x + 1, y + radius - 1, color)
-  pix(x + w - radius, y + 1, color)
-  pix(x + w - 2, y + radius - 1, color)
-  pix(x + radius - 1, y + h - 2, color)
-  pix(x + 1, y + h - radius, color)
-  pix(x + w - radius, y + h - 2, color)
-  pix(x + w - 2, y + h - radius, color)
+local function draw_rounded_rect_border(x, y, w, h, corner_radius, color)
+  line(x + corner_radius, y, x + w - corner_radius - 1, y, color)
+  line(x + corner_radius, y + h - 1, x + w - corner_radius - 1, y + h - 1, color)
+  line(x, y + corner_radius, x, y + h - corner_radius - 1, color)
+  line(x + w - 1, y + corner_radius, x + w - 1, y + h - corner_radius - 1, color)
+  pix(x + corner_radius - 1, y + 1, color)
+  pix(x + 1, y + corner_radius - 1, color)
+  pix(x + w - corner_radius, y + 1, color)
+  pix(x + w - 2, y + corner_radius - 1, color)
+  pix(x + corner_radius - 1, y + h - 2, color)
+  pix(x + 1, y + h - corner_radius, color)
+  pix(x + w - corner_radius, y + h - 2, color)
+  pix(x + w - 2, y + h - corner_radius, color)
 end
 
 function UI.draw_textbox(text, box_x, box_y, box_w, box_h, scroll_y, color, bg_color, border_color, center_text)
diff --git a/inc/window/window.minigame.ddr.lua b/inc/window/window.minigame.ddr.lua
index fdb9cff..6a0167c 100644
--- a/inc/window/window.minigame.ddr.lua
+++ b/inc/window/window.minigame.ddr.lua
@@ -306,19 +306,19 @@ local arrow_rotations = { down = 0, right = 1, up = 2, left = 3 }
 local function draw_arrow(x, y, direction, color)
   local size = 14
   local half = size / 2
-  local center_x, center_y = x + half, y + half
+  local pivot_x, pivot_y = x + half, y + half
   local steps = arrow_rotations[direction] or 0
 
-  local head_left_x, head_left_y = rotate(x, y + half, center_x, center_y, steps)
-  local head_tip_x, head_tip_y = rotate(x + half, y + size, center_x, center_y, steps)
-  local head_right_x, head_right_y = rotate(x + size, y + half, center_x, center_y, steps)
+  local head_left_x, head_left_y = rotate(x, y + half, pivot_x, pivot_y, steps)
+  local head_tip_x, head_tip_y = rotate(x + half, y + size, pivot_x, pivot_y, steps)
+  local head_right_x, head_right_y = rotate(x + size, y + half, pivot_x, pivot_y, steps)
 
   tri(head_left_x, head_left_y,
       head_tip_x, head_tip_y,
       head_right_x, head_right_y, color)
 
-  local stem_top_x, stem_top_y = rotate(x + half - 3, y, center_x, center_y, steps)
-  local stem_bot_x, stem_bot_y = rotate(x + half + 3, y + half, center_x, center_y, steps)
+  local stem_top_x, stem_top_y = rotate(x + half - 3, y, pivot_x, pivot_y, steps)
+  local stem_bot_x, stem_bot_y = rotate(x + half + 3, y + half, pivot_x, pivot_y, steps)
   local stem_x = math.min(stem_top_x, stem_bot_x)
   local stem_y = math.min(stem_top_y, stem_bot_y)
   local stem_w = math.abs(stem_bot_x - stem_top_x)