Stacky Letters is a vocabulary puzzle experience that challenges players to strategically arrange letters to form words and clear the board. In Stacky Letters, the player is presented with a stack of letters arranged in a tower-like structure. The objective is to select and place letters from a stack of letters to form words horizontally or vertically on the board. As words are formed, the letters disappear, allowing new letters to fall from above. The goal is to clean as many letters as possible and prevent the stack of letters from reaching the top of the screen.