I need help with this sentence from Re:zero


I'm reading the Re:zero light novel, volume 9. The second sentence in the book
is

> 水の中を漂うような、上下左右も曖昧な世界に投げ込まれている

What is 水の中を漂うような modifying? And I don't understand the meaning of 上下左右.




  * 水の中を漂うような modifies 世界. → "the world where I feel like drifting in water"
  * 上下左右【じょうげさゆう】 is simply "上下や左右" or "up, down, right and left." → "the world where even (the distinction between) up, down, right and left is vague"

