In Fortress Building Puzzle, players must strategically remove cubes from a towering castle to bring it down, with the difficulty adjustable from 1 to 7 floors of cubes. The game emphasizes problem-solving and spatial awareness as players navigate through various levels.

The storyline of Fortress Building Puzzle revolves around the challenge of dismantling a towering fortress, where players must use their wits to solve puzzles and achieve the goal of bringing the castle to the ground safely.

Fortress Building Puzzle stands out with its unlimited time feature, allowing players to take their time on difficult levels, and its physics-based gameplay ensures that all levels have a solution, enhancing the strategic depth of the game.