Nice concept, it's actually fun!
I think there is a luck of feedback since at the beginning I didn't understand the point of the game. I thought that all acceleration buttons don't work. I expected acceleration to be very visible.
Only after a while I realized that acceleration works, just not as fast as I thought.
Fixation of the record score would fit nicely as well.
But these are details. Overall it's fun experience, so good job!