Friend ranking implementation! The population of the ranking has become larger than I expected, so subdivide! In this update, the difficulty level has been adjusted and the system has been improved. -Reduced the difficulty of Tier 2 of Stage 3. 　This adjustment does not affect the time. ・Shuriken Ninja will take longer to attack. -Improved stability of ranking acquisition. ・The ranking has been subdivided. -You can select the ranking from 1st to 10th, your surroundings, and your friends' rankings.