The objective of Drop! is to eliminate drops as they continuously fall from the top of the board. Swap any two drops on the screen in order to line up three or more drops of the same color. If you clear enough drops, you'll proceed to the next level, in which the drops fall even faster. If a stack of drops reaches the top of the board, then the game is over. Drop! tests your puzzle-solving skills with three modes of play, simple controls, and increasingly challenging gameplay.