screen.surface.blit(self._surfaces[self._level_layer], (0, 0),
area=(viewport[0], viewport[1], WIDTH, HEIGHT))
if self._level_layer != 'floor':
screen.surface.blit(self._surfaces[self._level_layer], (0, 0),
area=(viewport[0], viewport[1], WIDTH, HEIGHT))
if self._level_layer != 'floor':