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1
Watch. A fresh board of tetrominoes slams together. The signal window then plays a sequence of colours — each sings its own note.
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2
Tap. Repeat the sequence on the board. Any piece of the right colour counts.
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3
Remember. The melody keeps every note and grows by one each round — but the board is rebuilt, so the colours move.
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4
Shape locks. From round 6 some steps show a silhouette: find a piece with that colour and shape (any rotation). Locked steps carry a notch.
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5
Go for fever. Fast, flawless taps fill the combo meter: ×2 at 8, ×3 at 20 — and the music kicks in. Every 5 rounds earns a life.