basically, just get the burger. you get a yippee every time you get it, and click on bob to here the most WONDERFUL sound in all of humanity. i have no idea how to make the volume work, so if you click the volume sprite, you won't be able to click it again to play the song. so yeah. if that ever happens press the green flag to replay the song. + the song finishes, be warned.
i used Pixilart to make the buildings, burger, and bob. the music for the game is called 'Elevator Music' and you can find that on https://tuna.voicemod.net/ i also used https://tuna.voicemod.net/ for the "yippee" sound effect, and the "burger" sound effect. (search up 'yippee' and 'burger' to get what you need :D)