Twilight in a stone bell tower. A hanging numeral asks for I, IV, or V in C — C E G, F A C, or G B D. Drag the root, third, then fifth onto the rope and Stack. A right pile is Rung! and the bells sound. A wrong pile is a Jam. Eight Stacks reach Bells clear.
Enter the tower
Tap Easy, Medium, or Hard. Then Stack in. Lives start at three. Eight Stacks reach Bells clear.
Read the numeral
The hanging plaque shows I, IV, or V. I is C E G. IV is F A C. V is G B D.
Drag root, third, fifth
Drag blocks onto the rope. Bottom is Root. Middle is Third. Top is Fifth. On Hard the blocks have no letters — pick them up to Hear the pitch.
Stack
Press Stack when three bells sit on the rope. Rung! sounds the chord and grows Score. Jam! shakes the tower and resets the Streak.
Stack the triad
Three bronze blocks. Drag root to the bottom slot, third in the middle, fifth on top. Press Stack. The hanging numeral keeps I IV V as numerals.
Rung or Jam
The matching pile is Rung! and the tower sounds the chord. A wrong note or wrong order Jams the bell, costs a life, and resets the Streak.
Score, Streak, Stacks
Each Rung! adds Score and grows the Streak. Eight Stacks reach Bells clear. Three Jams are Tower closed.
Difficulty that changes the ear
Easy is I only with notes labeled. Medium opens I IV V, still labeled. Hard keeps I IV V but hides the letters — blocks play on pickup.
Chord Stack is a middle-school harmony game in a twilight bell tower. A hanging Roman numeral asks for I, IV, or V in C. The player drags three bronze blocks — root, third, and fifth — onto a rope and Stacks them. A hit is Rung! and the bells play the triad. A miss Jams the bell. Easy stays on I with labeled notes. Medium opens I IV V labeled. Hard hides the letters so kids stack by ear.
Triads as a pile
Kids build I IV V with their hands. Root sits under third, third under fifth. That is closer to harmony than tapping a named card.
Stack is the verb
Rung! sounds the chord. Jam! punches the blocks. Score, Streak, and Stacks live on bronze plaques.
Numerals stay numerals
The hanging plaque keeps I IV V so every locale reads the same primary triads.
Hard is by ear
Difficulty changes the skill. Easy labels I. Medium labels I IV V. Hard plays each block on pickup and hides the letters.
Drag three blocks onto the rope — Root, then Third, then Fifth — and press Stack. Space also Stacks.
Primary triads in C. I is C E G. IV is F A C. V is G B D. The plaque keeps those numerals.
A wrong note or the wrong order. The bell jams, you lose a life, and the Streak resets.
Easy is I only, notes labeled. Medium is I IV V labeled. Hard is I IV V unlabeled — blocks play when you pick them up.
Sixth through eighth grade (middle school), when students build I IV V. Stay on Easy to learn stacking C E G.