Ooh, need to warm up my tetris-muscle I see. Twintris was always my favourite Tetris game, but I really haven't been playing it much recently.

There are two versions of it in the TOSEC set by the way, one released by Digital Marketing and the other released by the author Svein Berge. They do have differences in the gameplay (arcade levels aren't the same for one), so it will be necessary to specify exactly which release we will be playing.