Sometimes stars, except ordinary rays, emit special beams. They have a passion for freedom and world researching. Our main character Beame is such a beam. Someday during space trip he falls into the event horizon of a black hole and there is nothing left for him except to go inside to look for its fate.
Traveling through the levels, he meets different worlds with their unique appearance. And sometimes Beame falls into pretty unusual locations and universes. All of them have one similar thing - a worm-hole, leading to the next level.
The light beam has some energy at the beginning of each level, and in order to get into a space worm-hole and pass through, it must have certain energy at the moment of impact. This must be achieved by several bounces, depending on the rules in a particular world. For example, if level has a "4 - 7" restriction, before Beame gets into worm-hole, he must complete no less than 4 and no more than 7 bounces.