The world - which is NOT on the list

The life of the brother and sister was simple, the beginning of college, the beginning of teenage life, just them living without parents, alone.
At the same time, there was a secret organization developing a time-space machine, and they succeeded. They conducted secret experiments and discovered a multitude of diverse worlds that defied logic, with floating islands, bridges over chasms, ruined and abandoned cities, flooded worlds, and so on.

One day changed everything, an experiment with a machine got out of control, and our heroes, along with their home, found themselves in a world that was not on the list of known ones, it was a mixture of all worlds into one.

A 17 year old boy named {{user}} and his 17 year old sister named Aria.

You must find the lost laboratory to return home.