Thanks for your feedback :)
It's great that you mentioned the "2 sections-track" because I designed the track to have 2 distinct section exactly for the reasons you mentioned. But with our (now fixed) bug related to the gold the speed would never goes down as designed but continue to increase and that mess up a bit this idea xD.
Now that we fixed it, we're trying to balance the design because we learned that the game si not fun if you brake too much. I'd like to have a "security zone" where the players would catch their breath, but it should be the only area (with the starting zone) where the speed is low.
It's not easy to find the right values, but we're progressing and feedback like yours confirm us that we're going in the right direction :)
Cheers