Hello! The button order is randomized and there are 4 variations. There is supposed to be a clear difference in the sound, though. I'll look into it. (If you could share a video of the sounds the buttons make, that'd help a lot!)
Nevermind, I did some more testing and I discovered that one of the variations has repeating pitch sounds. Working on fixing it asap!
The bug has been fixed and I released the new patch! I don't think it will work if you use the save files from the old version though (Persistent save is okay to use).