It’s flat!
Nightmare mode is rather nightmarish. And this wasn’t even the scary part (when a sharken pushed all of our defenses to the crystal)!
Spiders attacking on both sides of a wall: apparently they can’t make up their minds which side they wanna be on. Either that, or they’re helping their friends! Yay!
It’s a bridge with no floor! I guess it’s because there’s no point in adding a floor in a part of the level you wouldn’t normally see. ^^;