12826. Not bad.
This is one of the better games I've come across here. I love the visual and audio design. The diving animation at the game start is something that I actually wanted to do as well, but couldn't find the time to do something like it. Great work.
As I was dashing at each interval, I thought to myself, I wish the green area was getting smaller so it would become harder the more I dashed, but I realized, eventually, that very slowly it was speeding up. At one point I was getting into a rhythm of perfect dashing, over and over. I barely saw any rocks for a while, I was just moving too fast, too perfectly!
I would love to see further updates, maybe adding the artifact/upgrade system you were initially thinking, to give this game some more depth (no pun intended).