You must ajust the window dimensions OR ajust the text size OR make the text shorter.
draw_text(x, y, width, height, "Yo'text!", alignment)

As mr_wiggles did for me, try to find the answer and I'll keep you on the good way to succeed by yourself. If it's possible, maybe send your code in private or on this topic. For that kind of menu, you must do as for the Scene_Menu script. For such thing, it's better to use a new Scene so you'll use main instead of initialize method. Or you could simply create the four windows separatly and update them in a scene. The problem is maybe only the dimensions. That's why I want you to send me the code. If you want to make the window separatly, use Window_ShopCommand as reference, I won't give you the answer, else, it's not funny .

For a scene:
s1="Title"
s2="Project Rising Sun"
s3="GEt OUt! Teaser"
s4="Hello Sukita."

@command_window = Window_Command.new(160, [s1, s2, s3, s4])
@command_window.index = @menu_index

Send me all the codes modified/added so I'll understand what you try to make and could help you to achieve it.

Problem:
Your windows sizes are simply not correctly defined.
@command_window = Window_Command.new(240, [s1, s2, s3, s4])
@command_window.height = 480
super(0, 0, 480, 480) # Window_Image

The game interface dimensions are: (640, 480) (x, y).
Look at your super method. 640 - 480 = 160. So you should set the command to 160 instead of 240 so the width will be the game interface. It's the same problem with the height, you've forgot to substract 32 (I suppose that you made it 64px height ) from your help window to the Window_Image height and @command_window.height .

If I remember, you said that the text looks funny? Try to change the text size. If you want to do it, now could try to alias the Window_Command initialize and refresh methods like this:

Code:

#==============================================================================
# ** Window_Command
#------------------------------------------------------------------------------
#  This window deals with general command choices.
#==============================================================================
class Window_Command < Window_Selectable
  attr_accessor :text_size
  #--------------------------------------------------------------------------
  # * Object Initialization
  #    width    : window width
  #    commands : command text string array
  #--------------------------------------------------------------------------
  alias handy333_scenegallery_windowcommand_initialize initialize
  def initialize(width, commands)
    handy333_scenegallery_windowcommand_initialize(width, commands)
    @text_size = 24
  end
  #--------------------------------------------------------------------------
  # * Refresh
  #--------------------------------------------------------------------------
  alias handy333_scenegallery_windowcommand_refresh refresh
  def refresh
    handy333_scenegallery_windowcommand_refresh
    self.contents.font.size = @text_size
  end
end


Personally, I use long and precise aliasing method so I know where and what it's supposed to be aliased. What this code do? It call Window_Command::initialize and add in the method at the top, center or the bottom, depending on where you put the alias name, everything you write. It's like if you create a new method and call it instead of initialize. I added in the attr_writer : text_size too so you could change it later like this:
@command_window.text_size = choosen_size

I don't know actually if that work but, it should.

Suggestions:
Ok, first, at the end, the class Window_Helping, I think it's useles. There's already a class name Window_help in rpg maker that you can call like this: @window_help = window_help.set_text(text, align = 0) and set is position x or y like this: @window_help.x and @window_help.y .

Line 129 to 134, delete one of the comment .

At the end of the music call, use rescue nil:

Code:

Audio.bgm_play("Audio/BGM/Say it From Your Heart", 70, 0) rescue nil

If the player don't have the music, the game won't crash and simply return nil. Should use it for the pictures too. But, if you do that, in the end of the loop in main, you should do this:

Code:

@bg.bitmap.dispose if @bg.bitmap != nil
@bg.dispose if @bg != nil
@ima.dispose if @ima != nil

Instead of using Window_Image. Just call a dummy_window . @dummy_window = Window_Base.new(x, y, width height) will save your time by creating an empty window.

I may have miss something so ask again if you still have a problem. Still edit on this post.


EDIT: Ok, so the post about aliasing the method don't work. I made this and it does. Just modify your windows sizes now.

Spoiler:

You must unactive $game_temp.scene_gallery when the gallery is disposed and active it when initialize. I give you this because, I want you to read and understand what I made.