Word for increasing acceleration
Solution 1:
The term in physics for the rate of change in acceleration appears to be "jerk", "jolt", "lurch", or "surge".
So maybe the comparative form is "jerkier"?
I would probably just say you "go faster faster".
See the Wikipedia article.
Solution 2:
In a long career in physics I have never met a general word that describes an increasing acceleration in the same way that acceleration describes an increasing velocity.