Columns of three coloured gems fall in — reorder them on the way down and stack matches in any direction to keep the well from filling.
Each piece is a vertical stack of three gems. Slide it left and right and cycle the order of the three gems, then drop it onto the pile. Line up three or more of a colour horizontally, vertically or diagonally to clear them and prevent the well from overflowing.
Prism Drop draws on the falling-gem puzzle of 1990 — columns of three jewels drop in, and you cycle their order to line up three or more in any direction, diagonals included, chaining cascades as they clear. A slick variation on the falling-block puzzle.
Prism Drop is an original free browser falling-gem puzzle with three-gem columns and any-direction matching across three difficulty levels. No install required.