Bubble Trouble is centered around a research scientist called Travis who works at a high energy institute experimenting with dense matter and the theoretical creation of black holes for interstellar travel.
You are Travis, arriving in a huge world built of bubbles. Travis is luckily rescued by a friendly denizen of this bubble world, one of the rare free floating air bubbles. The bubble is able to help him in a variety of ways. He can use it to negotiate the world, and to protect him from the hostile environment.
Your only hope for survival is to find the right radioactive deposits, use the transit projector, and go home again.