Gum Gum Battle, developed by Dwango Co. Ltd., is a free iPhone game that offers a unique fighting experience. The game's concept revolves around stretching the character's body parts, such as the head, arms, and legs, to attack and defeat your opponent. The game's mechanics are simple yet satisfying, allowing players to smash their opponents to the wall.

The game's controls are easy to understand and use, making it accessible for players of all ages. Gum Gum Battle offers a refreshing take on the traditional fighting game genre, and it's a perfect choice for players who are looking for something different. The game is super fun and engaging, and the stretching mechanics are incredibly satisfying. Gum Gum Battle is a must-try for anyone who loves fighting games.