Nimble Quest is an adventure video game released by NimbleBit on March 28th, 2013.
In Nimble Quest, the gameplay is similar to snake in a few ways. The player moves around and kills enemies whom he gets close enough in proximity to. Once enough enemies are killed, you advance to the next level. If you hit a wall, an enemy, or you run out of health, you die.
Source: Wikipedia, "Nimble quest", available under the CC-BY-SA License.