Velocity is currently not approved to run on Vita in the US.
Which is a shame, because it actually plays the best on Vita; and we know this because it runs fine for people over here in Europe.
SCEA (PlayStation USA) are having issues getting a bunch of PSP games approved for Vita, and Velocity is unfortunately one of those.
We’re on the priority list apparently, but we don’t have an ETA. We’ll post back when it’s sorted. You’ll be able to play on PSP and PS3 in the meantime.
There’s nothing we can do but wait 🙁
Thanks for your patience,