A free program for Android, by Yusong Games.

Two powerful elves are going to battle in the magic kingdom. Each of them has exclusive abilities that can help the other out. But if one is killed, then the other one will take over. Fire Boy and Ice Girl Adventure is a two-player game where you have to collect rubies to get to the exit. But be aware of the powerful enemies that can kill you.

A player can only move in one direction at a time. To move in the other direction, you have to first cover the distance you have covered. If you die, then you lose the current game.