Casual game playing off the idea of the Tetris genre, but with a twist: each 4-square block is composed of two kinds, orange and blue. Fill a row entirely with either one and it's cleared - but don't rely on the solidity of everything, as an orange can fall straight through a blue, and vice versa.
unoriginal
It's not a large game, sure, but- we don't *think* this mechanic - or a similar one - has been employed anywhere else? Or do you mean that all Tetris variants are unoriginal?
Have you actually tried playing it....?