That's a great idea for a Realm Layer!
Later on there will be Realm layers with different Enemies, Bosses and rewards all getting more difficult the further you proceed.
I'm already brainstorming for some Ideas for designs!
Big Update coming very soon including an improved Ai for the Sprawler allowing him to walk around, giving a much more natural look. A whole new Attacking System. About 14 Character Stats All to improve and specialize! A Weapon System and more!