ふにゃふにゃブロック is a free puzzle game designed for iPhone users, featuring a unique twist on traditional block stacking mechanics. Players engage in a single-player mode where they aim to stack soft, unstable blocks resembling those from Tetris as high as possible. The game concludes if any block falls, and the score is determined by the total number of successfully stacked blocks.

The controls are intuitive, allowing players to swipe to move blocks side to side and utilize on-screen buttons to rotate them in any direction. Once the desired position and angle are set, players can drop the block by pressing the DROP button. Additionally, players can hold blocks for strategic exchanges. This game appeals to puzzle enthusiasts, particularly those who enjoy cute and engaging gameplay reminiscent of Tetris, as well as those interested in online competition and rankings.