Don't judge a book by its cover, this game is really REALLY difficult!
This is an intense fast-paced puzzle game where you pick up lines of blocks to match them against each other, while also sending garbage blocks to your opponent to try and make their pile go over their limit before they do the same to you. There is also another style of playing the game, as the game developers combined their alternate puzzle game and fused it into this game, so you could actually be playing two different game modes at the exact same time! I can't exactly say in words how frantic this game is, but I think most people that picked this game up at the same time as me only played through it once and ended up never beating it because the game mechanics were too difficult.
At later stages of the game, the only way to beat your opponents are by chaining together increasingly large and complex combos, which would make this game incredibly frustrating for anyone who expected this to be a casual game.
I would highly recommend anyone to try to find some videos of this game before buying it, because I think a lot of people won't have the patience to actually sit down and try to beat it, even if there are infinite continues (which is also a mechanic of unlocking some bosses/achievements - aka no death runs). It's a fun game overall though, and I think I did get exactly what I paid for.
Just don't underestimate it because of how it looks!