How do you play twinkle twinkle in Achievement unlocked 2?

In Achievement Unlocked 2, you can play "Twinkle Twinkle Little Star" by interacting with the piano in the game. To do this, you need to find the piano and then press the keys in the correct order to replicate the melody. The game rewards you with achievements for successfully playing the song. Keep experimenting with the keys if you're not able to get it right the first time!