Weighted Seesaw is a block-puzzle game with physics elements. The player's goal is to perfectly balance colorful polyomino and other shapes on a black seesaw-style balance beam across 35 levels. When they perform well, the words "Balance Achieved!" appear on the screen with bursts of confetti.
The game allows the player to rotate the shapes to make placement easier. They merely need to repeatedly select a small button near the bottom-right corner of a shape. Each selection provides a quarter-turn of rotation.
Weighted Seesaw makes play extremely difficult in several ways. It typically supplies the player with an uneven number of heavy or overall shapes. It often provides an abundance of shapes that are difficult to fit entirely on the beam. It sometimes supplies round shapes that bounce or roll off the seesaw.
On some levels, the game challenges the player with locked shapes in specific positions. The player must drag and drop the other shapes into supportive spots under, next to, or atop one or more locked ones.
The player can restart a level at any time by using the reload double-arrows icon to the right of the house icon near the top-left corner of the screen. They can also select the "Reset all pieces" text near the bottom-right corner.