I love the game, I've put in over 100 hours clicking away in the past 5 years. My only problem is, the volume controls are a bit buggy. I’ll list them here and I hope you can fix them.
When ”Sound Volume” is set to 0, the sound effects don’t mute. They continue playing at 1/10 volume.
When starting the game, sound effects are always glitches to be very loud, even when they are left at a setting of 0/10. In the options menu, the volume setting will still display the level you previously had it at, but the output is very loud. Adjusting the volume fixes this glitch, until closing and reopening the game again. This doesn’t happen when the game is left in the background.
If you begin to play audio from a background app (like Podcasts) while the game is already running, the game stops the audio from the podcast entirely. However, if you play the podcast in the background first, and then open the game, you can listen to the podcast while playing.