Flex Run 3D is a free game available for iPhone users. Developed by VOODOO, it is a challenging obstacle course game that tests your reflexes and problem-solving skills. The game's objective is simple: slide your finger to move your character and fit through incoming obstacles.

The game's graphics are sleek and visually appealing, with a futuristic neon theme. The gameplay is smooth and responsive, and the controls are easy to understand. The game's difficulty gradually increases as you progress through the levels, making it an addictive and engaging experience.

Overall, Flex Run 3D is an entertaining game that provides a fun challenge for players of all ages. It's a great choice for anyone looking to pass the time and test their skills.