level_options->add_pair_of_buttons(Button(img_next_sector_bt, _("Next sector"), SDLKey(0)), BT_NEXT_SECTOR,
Button(img_previous_sector_bt, _("Prevous sector"), SDLKey(0)), BT_PREVIOUS_SECTOR);
level_options->add_pair_of_buttons(Button(img_next_level_bt, _("Next level"), SDLKey(0)), BT_NEXT_LEVEL,
level_options->add_pair_of_buttons(Button(img_next_sector_bt, _("Next sector"), SDLKey(0)), BT_NEXT_SECTOR,
Button(img_previous_sector_bt, _("Prevous sector"), SDLKey(0)), BT_PREVIOUS_SECTOR);
level_options->add_pair_of_buttons(Button(img_next_level_bt, _("Next level"), SDLKey(0)), BT_NEXT_LEVEL,