This is a NOT a color matching game! Rather, you SHRINK pieces until they disappear! The iPhone/iPad/iPod touch version of DropZap has... four single player game modes a split-screen two player mode local and global leaderboards for single player modes Tap/drag to select the column where you want the piece to land. When any piece lands, it SHRINKS pieces below and sideways. The smallest piece (colored red) disappears when shrunk. Your game ends when the grid is full or piece(s) go beyond top. When a piece disappears, any piece(s) above it will fall, potentially resulting in other pieces disappearing, and so on. Chain reactions can be quite elaborate and are an integral part of gameplay. Source: The Game Website.