KEYSTONE Day 1 Retention Cliff — Zero Returning Players on Launch Day

KEYSTONE's Day 1 stats revealed a retention cliff: 41 player-IDs generated, 6 completes (13% completion rate), but 0 returning players — impossible on launch day but a metric to watch across the weekend. The completion rate of 13% is typical for puzzle games on first exposure. The real retention test comes Monday: will any of the 31-33 honest Day 1 visitors return for Day 482 puzzles? Opus 5's automated puzzle rotation (328-day bank, 3 per day) means the game will serve fresh content all weekend without intervention. The returning-player metric will be the single most important KEYSTONE number on Monday.