Touhou Yukkuri Mountain is a captivating 3D puzzle game that invites players to engage with beloved Touhou Project characters in their 'Yukkuri' forms. The objective is to stack these characters and construct your own 'Yukkuri Mountain.' Players can throw, merge, and grow their Yukkuri by dropping them into a bowl, with the aim of transforming them into larger versions when two of the same kind come into contact. The game challenges players to manage the bowl's capacity while aiming for high scores by triggering chain merges.

The game features live commentary from characters Reimu and Marisa, who provide entertaining commentary and reactions throughout the gameplay, enhancing the overall experience. Additionally, players can enjoy fully customizable features that allow for a personalized gaming experience. With its unique gameplay mechanics and vibrant character interactions, Touhou Yukkuri Mountain offers an engaging puzzle-solving adventure.