How to call one class in the principal main?.

I do a code for the bullet using OOP and i tried to call the class of bullet in the principal main but is doesn't worked, and i want really know how to do it

Link of my game: https://microstudio.io/rianstar/ghosthunt/

THANKS FOR THE HELP <33333333333

ghost file

ghostINIT = function()
  ghost = object end
  ghost.speed = 2
  ghost.facing = 1
  ghost.x = 0
  ghost.y = 0
  ghost.width = 8
  ghost.height = 8
  ghost.dash = 0
  ghost.cooldown = 0
  ghost.dash_active = false
  ghost.bullets = []
end

ghostCooldown = function()
  if (ghost.dash == 0) and ( ghost.cooldown > 0) then
    ghost.cooldown -= 1
  end
end

ghostDash = function( isMoving )
  if (ghost.dash_active) and (ghost.cooldown == 0) then
    if isMoving then
      if ghost.dash == 0 then
        ghost.dash = 60
      end
    end
    if ghost.dash > 0 then
      ghost.dash -=1
      if ghost.dash == 0 then
        ghost.cooldown = 120
      end
    end
  end
  
  return ghost.dash > 0
end

ghostUPDATE = function()
  local isMoving = false
  if keyboard.release.B then
    ghost.dash_active = not ghost.dash_active
  end
  
  if keyboard.RIGHT then
    ghost.facing = 1
    ghost.x += ghost.speed + ghostDash(true) * ghost.speed
    isMoving = true
  end
  if keyboard.LEFT then
    ghost.facing = -1
    ghost.x -= ghost.speed + ghostDash(true) * ghost.speed
    isMoving = true
  end
  if keyboard.DOWN then
    ghost.y -= ghost.speed + ghostDash(true) * ghost.speed
    isMoving = true
  end
  if keyboard.UP then
    ghost.y += ghost.speed + ghostDash(true) * ghost.speed
    isMoving = true
  end
  if not isMoving then
    ghostDash(false)
  end
  ghostCooldown()
  if keyboard.SPACE then
    ghost.bullets.push( new Shot( ghost ))
    bb =new Shot( ghost )
  end
  print("bullets="+ghost.bullets.length)
  for i = ghost.bullets.length -1 to 0 by -1
    local b = ghost.bullets[i]
    print(b.active)
    b.update()
    if b.active == false then
      ghost.bullets.removeElement(b)
    end
  end
end

main file

init = function()
  //maneira porca de fzr coordenadas no mapakkkk
  x = 0
  y = 0
  
  //isso e pra chamar a funcao do player
  //uma tecnica pra nn deixar o codigo mt longo
  ghostINIT()
 
  touchKeys.arrows = not system.input.keyboard

  touchKeys.keys = ["X","B"]
  
  menuINIT()
end

update = function()
  menuUPDATE()
  
  //isso e pra chamar a funcao de update
  ghostUPDATE()
  if keyboard.B then
    ghostDash()
    ghostCooldown()
  end

  //maneira tenebrosa q eu fiz o limite do mapa
  //se o codigo de um segundo atras me da medo
  //imagine o de 1hr atras kskskskssk
  ghost.x = limitmap(ghost.x, -152, 152)
  ghost.y = limitmap(ghost.y, -80, 80)
  
  
  touchKeys.update()
 
end

draw = function()
  
  screen.fillRect(x,y, 450, 200, "rgb(0,0,0)")
  screen.drawMap("level1_red",x,y, 350, 200)

  //isso de setDrawScale pra poder desenhar as escalas
  //dependendo de pra onde o personagem esteja virado 
  screen.setDrawScale(ghost.facing, 1)
  screen.drawSprite("ghost", ghost.x, ghost.y, 16, 16)
  for b in ghost.bullets 
    b.draw()
  end
  screen.setDrawScale(1,1)
  touchKeys.draw()
  
  menuDRAW()
end

Shot file

Shot = class
  constructor = function( source )
    this.x = source.x
    this.y = source.y
    this.width = 12
    this.height = 12
    this.facing = source.facing
    this.step = 0
    this.dist = 0
    this.active = true
  end  
  
  update = function()
    if this.active then
      this.step += 1
      if this.dist > 1000 then
        this.active = false
      end
      this.dist += 30
      this.x += 30 * this.facing
    end
  end
  
  draw = function()
    if this.active then
      screen.drawSprite("gshot", this.x, this.y, 12, 12)
    end
  end
end