Must Escape The Haunted House Walkthrough Cool Math Games

A small escape game from the flash era. You need to find three skull keys to open the door and escape from the hunting lodge. By the way, I understand that the author of this game is still making escape games.
www.coolmathgames.com/0-must-...

[@placeplace3654]

thank you

[@jordan-yr5ut]

i don't get the piano bit

[@MrBee_55]

Play DEFACE on the piano

[@keenanbeanentoyz]

The chest wasn't right

[@user-cupidscorner]

It’s different for everyone you need to look at the colors on the chairs