Running around is half the fun. A stray path is usually enough to make you wonder what is hiding beyond it, while fights stay snappy enough to handle without breaking the pace. Some of the best finds sit slightly off-route, so taking the long way is often worth it.
The unlocked full version gives you the broader selection of weapons, abilities, pets, and mounts to mess with. Swapping outfits and riding through familiar areas adds a nice bit of personality too. Good stuff for anyone who likes side-scrolling action with room to wander.