All levels unlocked.
Consider the ninja. Stealthy, deadly, silent as a field mouse's ghost covering a sneeze during church. Unless you're in HeroPunch's Black Bit Ninja 2, however. Then you're more of the retro, puzzle, fly-through-the-air-dealing-swift-justice-with-your-katana variety. The game has you launching your legless, square ninja man against his red enemies by clicking and dragging with the mouse. You have a limited number of launches so aim and timing are key. Your ninja slices the bad guys up on his own, it's up to you to see he avoids the saws, pitfalls, and other such nonsense to see that all the right baddies get sliced.