You can list the voltages of the IC to make sure everything is being powered correctly.
Follow Pin order as shown in a datasheet (Google Chip name and the word Datasheet).
Billy and the rest of us already went over your entire build and verified all components visually and since this was a kit I feel extra secure in that everything is correct. There is not much else to check from our end.
Also an Audio excerpt would indeed be helpful since I can hear if something is obviously wrong or right. I only used an iPhone to record the one I made for you above and sounds like it but I can easily tell if the circuit sounds correct.
If I say it sounds right and you hate it then it is subjective. (Case Closed) If I hear something wrong then it isn’t.