The Piano puzzle plays a short melody and asks the player to repeat it by jumping on the keys (Allthings.how). Four correct sequences clear the puzzle and add bonus time plus a shiny Lumin.
Enemies and Lumins can land on keys mid-sequence and break the rhythm. Clear all nearby Lumins and threats before starting the puzzle.
Each success adds bonus seconds to the stage timer — an extra Lumin and an extra time bank are both downstream benefits of a clean Piano clear.