Chain Bump is a free puzzle game developed by OTOUCH for Android devices. The game is based on the concept of Rube Goldberg machine, where the player has to insert a falling ball into the goal cup by editing the positions of objects in the game. The game offers a challenging and entertaining experience for puzzle enthusiasts.

The game features different levels with varying degrees of difficulty. The player has to use their creativity and problem-solving skills to complete each level. The game's graphics are simple and colorful, providing a pleasant visual experience. The game's controls are easy to use, and the interface is intuitive, making it easy for players to navigate through the game.

Overall, Chain Bump is an enjoyable puzzle game that offers a unique and entertaining experience for players. The game is free, and its challenging gameplay and simple graphics make it a great option for puzzle enthusiasts who enjoy Rube Goldberg-style puzzles.