"Bejeweled game in which you have to group colours, but only by interchanging blocks for others."
Triple Blocks is a game that`s quite similar to Block Shifter (in other words like Bejeweled) but with a big and interesting difference: you don`t have to move blocks of colours, just interchange them. In other words, you can randomly move each of the blocks, as you can only move one block for another that`s adjacent.
So, Triple Blocks is much more difficult than Block Shifter to solve. It isn`t easy to combine the coloured blocks without, at the same time, altering the other blocks that have already been interchanged.
Everything else in Triple Blocks is like Bejeweled: group 3 or more of the same colour together (vertically or horizontally) to make them disappear.