This was really fun, love the art style and that I managed to guess my way to victory, haha.
One problem I did have was that upon starting the game the audio jumped back up to normal volume after I'd turned it down- but otherwise it was enjoyable.
Nice catch there, It is actually loading the last volume setting that you've saved on that slot. You could adjust it after you enter the last save game under the gear icon on the top left corner.
PS: Love your accent !