Gameplay
Kanon is a romance visual novel in which the player assumes the role of Yuichi Aizawa. Its gameplay requires little player interaction as much of the game's duration is spent on reading the text that appears on the screen, which represents the story's narrative and dialogue. Kanon follows a branching plot line with multiple endings, and depending on the decisions that the player makes during the game, the plot will progress in a specific direction.
There are five main plot lines that the player will have the chance to experience, one for each of the heroines in the story. Every so often, the player will come to a point where he or she is given the chance to choose from multiple options. Text progression pauses at these points until a choice is made. To view all plot lines in their entirety, the player will have to replay the game multiple times and choose different choices to further the plot to an alternate direction. After Mai's scenario is completed, a replay of her route will offer an additional choice to play through Sayuri's back-story. Jun Maeda, who worked on the scenario for Kanon, commented in March 2001 that the Japanese public may have fallen under the impression that Key makes soothing games because of Kanon's influence, but Maeda affirmed that there was not one person who worked on Kanon who thought that.
In the adult versions of the game, there are scenes with sexual CGs depicting Yuichi and a given heroine having sex. Later, Key released versions of Kanon without the erotic content. The versions that include the adult content have one explicit sex scene in each of the five main story routes, in addition to one fantasy scene. Outside of these, there are two scenes with nudity. Yūichi Suzumoto, a scenario writer who worked on later Key titles, commented that the sex scenes in Kanon are very self-contained, and can be easily removed without altering the story. Maeda was asked what he thought if the sex scenes had been written to promote human reproduction, but he remarks that it would not work in games like Kanon or Key's later game Air.
Read more about this topic: Kanon