Actually its like a bunch of free games. Not only can you play straight up Tetris or Puyo Puyo, you can also play the mode where the boards switch between the two. And you can do all this with up to 4 players. And thats all the stuff built into the free demo, that doesn't have any usage or time limit. At 685mb, its not a large file either. I'm sure most people here are aware of this game's demo, but if not, and you're looking for more games on your Switch, you really can't go wrong with this game's free demo, I'm personally probably never going to buy the full game, but I'll probably never get rid of the demo.