“That one level you hate in a game you otherwise love”
Let me explain something. Xenogears is an RPG with random encounters. It also has a jump button. Those elements combine in an annoying way, because if you run into a battle in mid-air, you lose your momentum and fall straight down.
The first half of Babel Tower is a vertically oriented area with a lot of hard jumps where missing a jump means falling back to the beginning, and it has random encounters.