The entire game lasts just six minutes, during which you have to try to survive the end of the world. You will see how the ground begins to crumble beneath your feet, and you have to try not to fall into the abyss because if you do so, you will die.
In addition to paying attention to the ground, you also have to avoid the water. If by chance you try to run away from the disaster, you will run into the water. And you will drown. And you will have to start all over again from the beginning. Bad luck to you.
Visually speaking, Env is marvelous, particularly when there's lots of movement, as you'll see tons of blocks flying all over the screen.
Env is a unique independent game with very interesting gameplay. In addition, it is visually stunning, though it does demand a lot from your computer.