Quarth is a classic puzzle game where your goal is to fill in blocks to form complete rectangles or squares. The playing field is filled with different blocks, and as it scrolls down, new unformed blocks appear. Your aim is to clear the lines of blocks by forming complete shapes. If you succeed, the concerned blocks will disappear. However, if a line of blocks reaches the bottom line, the game is over.
The game consists of multiple levels, each with 9 areas. You need to progress to the next level once you've cleared the last area. The game also features a Battle mode where two players can compete against each other. The game ends when all areas have been cleared, and then you're given 10 seconds to decide if you want to continue playing.