From the developer:
Shadow Blade is a fast-paced ninja platforming game for iPad/iPhone and Android devices (including Ouya), from Dead Mage Game Studio. It features intuitive touch controls and an array of weapons and challenging levels. Shadow Blade: Reload is the enhanced version of the game for PC that includes a full level editor to create and share levels. Becoming a ninja is at your fingertips!
Kuro is a young man on his quest to become the Shadow Blade. He must seek the teachings of the last remaining ninja master. You will guide him through challenging levels, around countless traps, sneaking past enemies or right over their dead bodies. You have to be fast, be stealthy, be aware of your environment. You have to be a ninja.
Source: The Developer Website.
The game consists of bite sized levels and rewards the player based on three factors: the total time to traverse the level from start to the end, the number of orbs collected across the level and the number of hidden objects found.
The main challenges revolve around precision platforming, combat and stealth play.
Source: Wikipedia, "Shadow Blade", available under the CC-BY-SA License.