Look, let me break this down for you 😁 I’m actually obsessed with this game 😁
So... you arrange the blocks... however you see fit—it's all about strategy... here are a few screenshots I grabbed from Google



The goal is basically to clear blocks—specifically pairs of identical ones that aren't obstructed by anything else... kind of like this

Essentially, once you clear two blocks, you open up space for two more... it's pretty addictive
Though I'm having a hard time visualizing how the four-player mode works (since, obviously, on a PC, it's just a solo experience) 🤔
If my explanation isn't quite hitting the mark, here are a few links that might help
link 1, link 2,
link 3