In quad survival and Terminal Velocity, the KEY is using your shield whenever you think it's getting too much. I would have won Terminal Velocity just then if I didn't run out of shield :/
Difficult, but fun.
I can usually get up to about level 11-12, and 40-50 on the speed rounds. I suspect that higher scores on the speed rounds are what's needed to win...
BEST. GAME. EVER. 10/5 and fav'd for sure. 9-ball gets the same treatment too by default, although I always prefered 8-ball over 9-ball. Now to get 61 trophies...