Click the screen to begin stacking emojis. Wait for the moving emoji to align with the stack below. Click again to place the emoji onto the stack. Focus to match the emoji perfectly with the one below to form a taller stack. Avoid misalignment, as it will trim the stack and make it narrower. Progress through challenging levels by assembling emojis as high as possible. Pay attention to the growing speed as you advance to higher levels. Hone your timing to attain the highest stack and complete all levels.