Stack Fall is a hyper-casual, helix-maze puzzle game similar to Tower Fall, Neon Tower, Jump Tower 3D and Helix Jump. The player's goal is to earn the highest score possible by directing a bouncing ball to drop safely down the side of a rotating tower via the destruction of platforms. They achieve their primary goal by reaching a black-and-white checkerboard final level at the base of the tower.
Unlike many similar games, the player doesn't direct the ball through gaps in the platforms. Instead, they direct it to bounce hard on colored sections to rip the platforms apart. If they direct it to hit stone-like dark gray areas too hard, then the surface of a platform destroys the ball. The player can continue by viewing an ad video or start over.
Stack Fall doesn't feature any other type of common helix-maze tower gameplay options, such as ball or platform customization. It's merely an endless game in which the player attempts to play as long as possible. That said, the game automatically changes the appearance of the tower with each new level.