Tidalis is a 2D puzzle game that is kinda a cross of match-3 and Tetris. Blocks of various colors drop from the top of the board, and the player can click any block to cause a stream to move in the direction(s) the arrrow on the block points. If it hits one of the same color, it's redirected in the way ITS arrow points, up to 3 blocks each step. It's a simple premise, but Tidalis contains an almost limitless number of spins on this basic format with special modes, block types, speeds, gravity, and any number of other ways to mix up the formula. for the price which this game frequently goes for, it's absolutely worth the price.
My one negative aspect to this game is the adventure mode - it's very long, and a large number of the levels rely too heavily upon luck of what the board looks like in its initial state: many levels are only rarely winnable, so it can be frustrating to try to work your way through the campaign and have to restart a level repeatedly just to get favorable conditions.
At any rate, it's unique among match 3 games, so if you're looking for something that feels both familiar and unique, you should give this a look.