Just press on the different "keys". The first one is A, the second is B, the third is C, the fourth is C2, the fifth is D, the sixth is E, the seventh is F, the eighth is G and the last one is a music. Enjoy, ❤️ and ⭐️!
❤️❤️❤️⭐️⭐️⭐️ Thanks a lot to @Maths-lafontaine for the last key!