Here is the buildguide for the Creep Cluster v0.3 – 9v
IC 2 (CD4053) has a small bug . Pin 6, 9 and 10 should have been connected to GND, but are not.
Use a snipped off piece of resistor leg to connect these pins to GND. Pin 7 and 8 are GND.
So: bend the metal leg like shown in the above picture and solder it. (on the backside of the IC. make sure you connect the right pins!)
The bug is that after a while the sound gets weird. This happens sometimes, but not always. This made the bug hard to trace 🙂