Not gonna lie, I've already spent more time then I should playing the game and only got to 650 score.
The difficulty is high for me, but at no point did I feel like it was unfair - it took me like 5 minutes before I could consistently collect the first clock but after that I didn't have any problem collecting it in every run.
One thing the game really needs in my opinion is a restart popup menu in which you can see your score and/or the highest score counter - this is a kind of game where players might want to share their highest score with other, but as is it might be difficult to even see your score at the heat of the moment.
Great work!