"[Smartphone Edition] PIXEL CALL GIRLS -REI-" is a mobile game created by the circle Milk Engine. The game features distinctive pixel art inspired by anime and the Touhou Project, with themes centered around shrine maidens and soapland/escort services. It also incorporates elements such as large/huge breasts, voluptuous figures, and emotionless expressions. With 801 copies sold, it's fair to say the game has attracted considerable attention for a doujin title.

Looking at the game's story and setting, a standout feature is the abundance of pixel art characters inspired by the Touhou Project cast. Players interact with these characters as they progress through the game. The story explores the unique personalities and relationships of various characters, with players taking control to explore the game's world. Fans of the Touhou Project in particular will find this game's setting especially appealing.

In terms of gameplay systems and player experience, the game features relatively simple controls for a mobile title. Players select characters and work through various scenarios. The difficulty level is fairly low overall. However, as the game progresses, character relationships and storylines grow more complex, requiring players to stay attentive and focused. The core experience revolves around enjoying character interactions and exploring the game's world.

When it comes to characters, presentation, and visual style, the beauty of the pixel art truly stands out. Character designs and animations are crafted with meticulous detail, allowing players to fully enjoy their interactions with each character. The soundtrack also fits perfectly with the Touhou Project atmosphere. The music and sound effects enhance the game's mood, helping players immerse themselves in its world.

As the sales figures suggest, this game has garnered solid attention. 801 copies is a relatively strong number for a doujin game. That said, the game's genre and themes occupy a fairly niche space. As such, it tends to be most highly rated among Touhou Project fans and enthusiasts of this particular genre. While the game's quality and appeal are undeniably high, its themes and genre limit its audience to a specific demographic, making broader mainstream adoption unlikely. All in all, this is a title that will be particularly attractive to Touhou Project fans and those who enjoy this specific genre.