🎛️ Chord: District bass variations

[ScottMorris]

• 💡 What: Varied the music engine's bass rhythm based on the current district threshold.
• 🎯 Why: Adds a small motif variation by district, escalating the musical tension and density as the player reaches harder areas.
• 🔊 How to hear it: Survive past Downtown (building 7), Construction (building 13), and Industrial (building 19) to hear the bass line switch from a relaxed half-time feel to a driving, syncopated rhythm.

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PR created automatically by Jules for task 1078062030526983858 started by @ScottMorris

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