Hi, thank you for playing, and thank you for your feedback.
Judging from what you said, the area you died on is a transition point between two areas. I tried to speed up the character to make the upcoming transition more cinematic, but it wasn't my intent to make it harder. I did add very visible arrows to try to point you to the correct side.
I've changed the speed of that speed-up in the new version which I'll upload in a little bit.
As for the rest of your feedback, while I don't disagree with you about the simplicity the game does change a little beyond the point you reached (with some other slight mechanisms coming in). And I think it starts becoming fun when you've hit the intensity and the ridiculousness of the higher speeds. My experience is that something simple morphs into something fun when it grows difficult.