function show_prelevel_screen()
    create_screen()

    local level_parser = OpenLevel("level1")

    level_parser:parse_mission_goals()
    :next(function(mission_goals) -- async callback
        create_mission_goals_widget(mission_goals)
    end)

    create_close_button(function()
        level_parser:close()
        hide()
    end)

    create_play_button(function()
        goto_loading_screen(level_parser)
    end)
end