function GameStep()
  if not do_pause then
    SetCollisionFlags(main_Player)
    for _, particle in pairs(LoadedParticles) do
      particle:Smart()
      particle:DoPhysics()
    end
    for _, enty in pairs(LoadedEntities) do
      enty:Smart()
      enty:DoPhysics()
    end
    AnimateTiles()
    Camera:positionCenterAt(main_Player.pos.x, main_Player.pos.y)
    --camera:positionAt(main_Player.pos.x, main_Player.pos.y,game.width,game.height)
  end
end

function GameDraw()

  GameworldDraw()
  GameworldLighting()

	-- hud
	textScale = 0.5

  -- debug
  if debug then DebugUI() end
  if debug_collision then
  	DebugColisions()
  	DebugEntities()
  end
end