We propose a user-friendly system for early detection of Alzheimer's Disease (AD). The proposed system is an improved version of a state-of-the-art system (SOTA), especially in the “usability/playability” factor of user experience. In recent years, dementia has become a social problem worldwide, and studies on early detection of it have been increasingly focused on. Spatial navigation, in particular, the in-game traveled distance, is considered one of the most critical keys that enable early AD detection. Both systems utilize the in-game traveled distance and a popular game called Minecraft. A user evaluation was conducted that confirms the proposed system outperforms SOTA in terms of the usability and playability factor and another factor about visual aesthetics, both with statistical significance.