Ferno is an action game developed by Backflip Studios and released on iOS. The game requires players to hold their finger on the screen for as long as possible, collecting points and avoiding the purple circles.
Absorb the orange circles to grow stronger and larger and collect more points, but make sure you bank those points before you're hit by a purple circle or they won't count. Wait too long and you could lose everything. Bank too soon and you'll miss that new high score.