Complex sentence: However, the DS touchscreen is a key feature of the game's controls, enabling players to utilize Viewtiful Joe's unique VFX powers such as splitting the level in half or swapping the top screen to the touchscreen and vice versa.
Split into simpler sentences: However, the touchscreen is a key feature of the game's controls. It enables gamers to split the level in half as well as swap the top screen to the touchscreen and vice versa.