Core Bingo Round Engine
Credits → cards/Boost/Power-Ups → bingo daub → rewards; all major layers reuse one round engine.
구조 설명
Power-Ups / Boosts Layer
Boosts increase item/reward output; Power-Ups add round efficiency and reward modifiers.
Recovery Lane
Gifts, Daily rewards, Collection Pass, Pantry Pass, Piggy Bank and PLUS soften Credits/item bottlenecks.