The Therapist Gamer

This PS Vita game is also on PS3 and various mobile app stores.  It's an endless runner where you can earn various upgrades by completing tasks.  It's pretty silly - for example, your character is named Barry Steakfries and your jetpack is actually a machine gun where you stay afloat by shooting bullets.  For a free game I thought it was actually pretty fun!

One advantage of playing this on the Vita is that you can use the rear touch pad to play so your finger doesn't obstruct your view of the screen .