Thank you for the game!
I really liked the presentation style and level of polish, and also how well game mechanics are explained. Music especially was of the highest quality! I was amazed to realize that music changes from one retry to the other, and that you probably have more then one music track for the main game mode. This is very impressive, considering how people (me included) often postpone music production to the last moment and go with the bare minimum. Cudos for the great work!
I found balancing acceleration/deceleration thrilling and exciting, since it provoked interesting dynamic when you oscillate between careful skirting and bursts of high speed action. But the decision to make time decrease faster as you increase speed felt questionable to me. This really discouraged taking high risks with high speed and instead encouraged slow and meticulous movement (I've completed the game twice: once on high speed with very little time left, and other time on very slow speed with more then 2/3 time left at the end). I think making time decrease slower as you increase speed would have make the skirting/action dynamic really shine.