Spectrogram of the sound files:
Btw I checked all files (dptg, hypno, painful box) with HxD -> only the solution.png seems to have information. Hidden file search didn't reveal much either.
I think that creator just cut some sounds ,breaking them to make words more multiple like words which have one pronounciation, and the point of the game is only to , maybe, show us how mad or crazy we are. Because my thought is that those letters never reach 780 points, and it's just like distraction.