Nimble Quest was a combination of an action RPG and the classic Snake concept[1] released for iOS and Android by NimbleBit on March 28, 2013.
If the player hits a wall or an enemy, or runs out of health, the game ends.
NimbleBit's website stated (on Sept 21, 2017) "Nimble Quest is not supported on devices running iOS 11.
We do not plan to update Nimble Quest at this time though we may decide to revive it in the future."
It is rated 4.5 stars out of 5 on the App Store, where it received Editor's Choice upon its release.