Skull Guitar Puzzle

Steps

1. Pray at the Gravestone on a full moon nightThe Gravestone is in the graveyard on the left of the island. Full moon: check the day/night clock.
2. Defeat 6 Living Zombies at onceGather 6 Living Zombies east of the graveyard and take all 6 down within 3 seconds (one area attack).
3. Set the 7 rows of graveyard signsHit the sign pointing to the row with more graves, from row 1 (north) to row 7: left, left, left, right, left, right, right. A mistake resets them.
4. Meet the Ghost in the castleThe Ghost is in the room right of the stairs, 2nd floor of the main castle.
5. Remember the garden trophy handlesThe trophy garden is the north courtyard on the 2nd floor, between the main castle and the Soul Reaper room. Stand before the planter facing the castle.
6. Enter the code at the circuit boardGo down to the castle basement and turn left to the circuits. Left-to-right handle = horizontal line, back-and-forth = vertical, tree = blank.
7. Set the 10 floor tiles to match the pipesHit a tile to change its color (black → blue → red → green). Top row left→right: blue, black, red, black, green; bottom row: black, blue, red, black, black.