Moving 2 gems at a time to clear a row of 3 or more identical gems is the core gameplay of this gem elimination game. Unlike most traditional line breaking games, it challenges the conventional way of doing things -- you have to remove gems from the bottom up, rather than from the top down or in any direction. In the game, you can only move stones horizontally, which adds to the strategy and fun of the game. You need to make the most of the empty space and move the gems cleverly to create the opportunity to eliminate multiple gems at once. At the same time, the game has an exciting constraint: don't let the stack of gems accumulate to the top of the screen. This requires the player to efficiently clear gems within a limited number of moves, keeping the height of the stack under control in order to challenge higher scores and levels.
