diff --git a/README.md b/README.md
index 41f1ac1..f255dc4 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@ Cave Story Randomizer
 Todo
 ----
 
-- Provide modified Cave.pxm. (When Bubbline or Fireball)
 - Print Warning/Error Count
 - Supress Hell Music Error
 - Write log
diff --git a/src/database/Cave.pxm b/src/database/Cave.pxm
new file mode 100644
index 0000000..b275867
Binary files /dev/null and b/src/database/Cave.pxm differ
diff --git a/src/database/items.lua b/src/database/items.lua
index cd5b54a..87dcc7f 100644
--- a/src/database/items.lua
+++ b/src/database/items.lua
@@ -103,7 +103,7 @@ function missiles(t)
   }
 end
 
-return {
+local data = {
   -------------
   -- WEAPONS --
   -------------
@@ -326,7 +326,7 @@ return {
     map = "EggR2",
     label = "0302",
   }),
-  wSuperMissileLauncher = {
+  mSuperMissileLauncher = {
     name = "Super Missile Launcher",
     map = "MazeS",
     getText = {
@@ -350,6 +350,12 @@ return {
   -- concealing a chest containing this massive expansion of 24 Misisles.
 }
 
+for k, t in pairs(data) do
+  t.key = k
+end
+
+return data
+
 --[[
 
 -- Weapons
diff --git a/src/main.lua b/src/main.lua
index 4f179c0..b6eaa58 100644
--- a/src/main.lua
+++ b/src/main.lua
@@ -10,6 +10,8 @@ Terebi  = require 'lib.terebi'
 lf = love.filesystem
 lg = love.graphics
 
+U = require 'util'
+
 local LOG_LEVEL = 3
 local function _log(level, prefix, text, ...)
   if LOG_LEVEL >= level then
diff --git a/src/randomizer.lua b/src/randomizer.lua
index b5d8e87..4065293 100644
--- a/src/randomizer.lua
+++ b/src/randomizer.lua
@@ -14,6 +14,12 @@ do
   end
 end
 
+local WEAPONS_WHICH_CAN_NOT_BREAK_BLOCKS = {
+  'wBubbline',
+  'wFireball',
+  'wSnake',
+}
+
 function C:randomize(path)
   local success, dirStage = self:_mountDirectory(path)
   if not success then
@@ -21,8 +27,11 @@ function C:randomize(path)
   end
   self:_seedRngesus()
   local tscFiles = self:_createTscFiles(dirStage)
-  self:_shuffleItems(tscFiles)
+  local canNotBreakBlocks = self:_shuffleItems(tscFiles)
   self:_writeModifiedData(tscFiles)
+  if canNotBreakBlocks then
+    self:_copyModifiedFirstCave()
+  end
   self:_unmountDirectory(path)
   return [[Randomized data successfully created!
 
@@ -76,7 +85,8 @@ function C:_shuffleItems(tscFiles)
     {'Cave.tsc', 'lFirstCave'},
     {'Pole.tsc', 'wPolarStar'},
   }))
-  tscFiles[firstArea]:replaceSpecificItem(firstItemKey, itemDeck:getWeapon())
+  local firstWeapon = itemDeck:getWeapon()
+  tscFiles[firstArea]:replaceSpecificItem(firstItemKey, firstWeapon)
 
   -- Replace all weapon trades with random weapons
   tscFiles['Curly.tsc']:replaceSpecificItem('wMachineGun', itemDeck:getWeapon())
@@ -90,6 +100,8 @@ function C:_shuffleItems(tscFiles)
       tscFile:replaceItem(itemDeck:getAny())
     end
   end
+
+  return _.contains(WEAPONS_WHICH_CAN_NOT_BREAK_BLOCKS, firstWeapon.key)
 end
 
 function C:_writeModifiedData(tscFiles)
@@ -106,6 +118,13 @@ function C:_writeModifiedData(tscFiles)
   end
 end
 
+function C:_copyModifiedFirstCave()
+  local cavePxmPath = lf.getSourceBaseDirectory() .. '/data/Stage/Cave.pxm'
+  local data = lf.read('database/Cave.pxm')
+  assert(data)
+  U.writeFile(cavePxmPath, data)
+end
+
 function C:_unmountDirectory(path)
   assert(lf.unmount(path))
   print("\n")
diff --git a/src/tsc_file.lua b/src/tsc_file.lua
index 6586446..3d97d3e 100644
--- a/src/tsc_file.lua
+++ b/src/tsc_file.lua
@@ -1,10 +1,5 @@
 local C = Class:extend()
 
--- https://www.lua.org/manual/5.1/manual.html#5.7
--- w+: Update mode, all previous data is erased;
--- b:  Binary mode, forces Windows to save with Unix endings.
-MODE_WRITE_ERASE_EXISTING = 'w+b'
-
 local ITEM_DATA = require 'database.items'
 
 function C:new(path)
@@ -27,7 +22,6 @@ function C:new(path)
       break -- continue
     end
     local item = _.clone(v)
-    item.key = k
     table.insert(self._unreplaced, item)
   until true end
   self._unreplaced = _.shuffle(self._unreplaced)
@@ -130,13 +124,8 @@ end
 
 function C:writeTo(path)
   logInfo('writing TSC to: ' .. path)
-
-  local file, err = io.open(path, MODE_WRITE_ERASE_EXISTING)
-  assert(err == nil, err)
   local encoded = self:_codec(self._text, 'encode')
-  file:write(encoded)
-  file:flush()
-  file:close()
+  U.writeFile(path, encoded)
 end
 
 function C:_codec(text, mode)
diff --git a/src/util.lua b/src/util.lua
new file mode 100644
index 0000000..03ff064
--- /dev/null
+++ b/src/util.lua
@@ -0,0 +1,18 @@
+local U = {}
+
+-- https://www.lua.org/manual/5.1/manual.html#5.7
+-- w+: Update mode, all previous data is erased;
+-- b:  Binary mode, forces Windows to save with Unix endings.
+MODE_WRITE_ERASE_EXISTING = 'w+b'
+
+function U.writeFile(path, data)
+  logDebug('writing file: ' .. path)
+
+  local file, err = io.open(path, MODE_WRITE_ERASE_EXISTING)
+  assert(err == nil, err)
+  file:write(data)
+  file:flush()
+  file:close()
+end
+
+return U