Thank you for playing. Yeah, I threw it together in an afternoon so the difficulty curve hasn't been tuned all that well lol.
Basically because the notes appear faster as measures are completed, the measures then complete faster which means the notes move faster which means the measures finish faster . . . Etc etc. It's an endless feedback loop of increasing speed causing it to spike exponentially.
Currently focussing on my submission to the GMTK Game Jam so this will be on the back burner for a while but may come back once that's done to tune it up a little bit. (Easiest solution off the top of my head would be to just get rid of the measures um . . .measure entirely.)