四字熟語スピード暗記(エビ四) ～ 効率よく暗記 ～

Overview
Embark on a brain-boosting journey with 四字熟語スピード暗記(エビ四) – a dynamic memory game designed for rapid memorization and efficiency that keeps you tirelessly engaged.

Key Features
1. Random Question Generation: A new challenge every time ensures long-lasting engagement and cognitive stimulation.
2. Scaling Difficulty: Each correct answer introduces more complex four-character idioms, further activating the brain.
3. Spaced Repetition: Questions are reintroduced based on the 'Ebbinghaus forgetting curve,' optimizing memory retention through timing intervals.
4. Unlimited Practice: Ability to review questions as often as needed, with repeated errors prompting future questioning.
5. Hall of Fame Achievements: Consecutively correct answers help idioms graduate to your Hall of Fame, signifying mastery.
6. Progression System: Surpass a 70% Hall of Fame rate to unlock new challenges, enabling continuous growth and learning.
7. Cost-Free Experience: Full app functionality is available at no charge, with supplemental income generated via ad network distribution.

Interesting Gameplay
1. Memory-inducing Tempo: Solve riddles briskly in a game-like fashion to exercise and rejuvenate the mind.
2. Fluent Power Knowledgehoarding: Master idioms steadily and establish memory hallmarks towards the acclaimed Hall of Fame.
3. Expanding Challenges: Passing the 70% threshold lets learners confront increasingly diverse problems, reflecting an enigmatic yet infinite pursuit of knowledge.

Background music provided in the game accentuates the setting, featuring "Devil Soul" to accompany intense focus sessions. All of this ingeniously-structured gameplay comes under the creative banner of KIG Co., Ltd.