it doesn't look very good in screenshots but youre in a snowy place, everything is white with some shading so you can still kinda see things, it's a smoky white environment and some snowflakes blowing around
you stare at things to interact with them, you walk around using a bluetooth controller
you pick up capsules which give you "marker" ammo
there are still cubes all around the map, some of them are enemies, some of them aren't, but they look the same
if you look at them they won't move, if you look away they get closer, it's pretty scary in VR, and it's great with headtracking
you can mark any cube, the point of the marking is so that you can mark which cubes you think are enemies
if you mark them all and make it to the other side of the map you win