実行されない

なぜかmainを実行するとzairyoが実行されます。
mainのzairyoの読み込みのところをコメントに変えても戻りませんでした。なぜこうなったのでしょうか。解決方法を教えてください。

zairyo.rb

#!ruby -Ks
require "./window2"
require "./syujinko"
require "./item"

def hit?(hero,bomb)
    diffx = hero.centerX - bomb.centerX
    diffy = hero.centerY - bomb.centerY
    if (diffx > -30) and (diffx < 50) and (diffy > -20) and (diffy < 50)
      return true
    else
     return false
    end
end
def clicked?(x,y,bomb)
  diffx = x - bomb.centerX
  diffy = y - bomb.centerY
  if (diffx > -20) and (diffx < 20) and (diffy > -20) and (diffy < 20)
    return true
  else
    return false
  end
end

def gameOver(window,hero)
  window.drawEndBack
  hero.draw
  window.refresh
  sleep 3
  exit
end

def checkScore(window,score)
  if score >= 200
     window.drawEndClear
     window.refresh
     sleep 3
     exit
  end
end

window = Window.new
hero = Hero.new(window,Window::WINDOW_WIDTH/2,Window::SKYLINE)
bomb1 = Bomb.new(window)
bomb2 = Bomb.new(window)
bomb3 = Bomb.new(window)
apple1 = Apple.new(window)
apple2 = Apple.new(window)
orange1 = Orange.new(window)
orange2 = Orange.new(window)
score = 0
clickCount = 0


while true do
   time = window.getTime
   while event = SDL::Event2.poll do
       case event
         when SDL::Event2::Quit
           exit
   when SDL::Event2::MouseButtonDown
     x = event.x
     y = event.y
     isClickedBomb1 = clicked?(x,y,bomb1)
     isClickedBomb2 = clicked?(x,y,bomb2)
     isClickedBomb3 = clicked?(x,y,bomb3)
     if isClickedBomb1 or isClickedBomb2 or isClickedBomb3
       gameOver(window,hero)
     end
     isClickedApple1 = clicked?(x,y,apple1)
     isClickedApple2 = clicked?(x,y,apple2)
     isClickedOrange1 = clicked?(x,y,orange1)
     isClickedOrange2 = clicked?(x,y,orange2)
     if isClickedApple1
        score = score + apple1.getScore
        clickCount = clickCount + 1
        apple1.reset
        checkScore(window,score)
     end
      if isClickedApple2
        score = score + apple2.getScore
        clickCount = clickCount + 1
        apple2.reset
        checkScore(window,score)
     end
     if isClickedOrange1
       score = score + orange1.getScore
       clickCount = clickCount + 1
       orange1.reset
       checkScore(window,score)
     end
      if isClickedOrange2
        score = score + orange2.getScore
        clickCount = clickCount + 1
        orange2.reset
        checkScore(window,score)
     end
     end
end

   SDL::Key.scan
   if SDL::Key.press?(SDL::Key::A)
       hero.moveLeft
   end
   if SDL::Key.press?(SDL::Key::F)
       hero.moveRight
   end

   window.drawBack
   hero.draw
   bomb1.drop
   bomb2.drop
   bomb3.drop
   apple1.drop
   apple2.drop
   orange1.drop
   orange2.drop

 if hit?(hero,apple1)
    score = score + apple1.getScore 
    apple1.reset
    checkScore(window,score)
 end
 if hit?(hero,apple2)
    score = score + apple2.getScore 
    apple2.reset
   checkScore(window,score)
 end

if hit?(hero,orange1)
    score = score + orange1.getScore
    orange1.reset
    checkScore(window,score)
 end
 if hit?(hero,orange2)
    score = score + orange2.getScore 
    orange2.reset
    checkScore(window,score)
 end

 if hit?(hero,bomb1) or hit?(hero,bomb2) or hit?(hero,bomb3) or time < 0
   gameOver(window,hero)
 end

   time2 = time.to_s.tr(' 0-9a-zA-Z',' ０-９a-zA-Z')
   score2 = score.to_s.tr(' 0-9a-zA-Z',' ０-９a-zA-Z')
   clickCount2 = clickCount.to_s.tr(' 0-9a-zA-Z',' ０-９a-zA-Z')
   hyouji = "あなたの得点 #{score2}点  残りは#{time2}秒  (クリック#{clickCount2} 回)"
   window.writeChar(hyouji)
   window.refresh
end

main.rb

#!ruby -Ks
require "./window.rb"
require "./kuizu.rb"
require "./zairyo.rb"

window = Window.new
window.drawBack
window.gamestart
window.refresh

while true do 
  while event = SDL::Event2.poll do
     case event
       when SDL::Event2::Quit
            exit
       when SDL::Event2::MouseButtonDown
           x = event.x
           y = event.y
           if window.kuizuclicked?(x,y)
              gamen
           end
           if window.zairyoclicked?(x,y)
             zairyo
           end
       end
  end

end

実行した跡と、フォルダの中も見せます。](c2fa7d8b0c07229871a4addb8a17a939.png)

足りない部分があればコメントください。