Juxtapose

Description:

The world as they know isn't unique, there are many of them that juxtapose another reality that works individually and completely free from the other, while they still have their similarities. With an exclusive power to act on two opposites, Ying and Yang, decide by turns what will happen in each of them, using the arrow keys to take control of the movements of the characters with a fake notion of freewill and Space-bar for their variable actions. Figure out what can be done and if any effect at all is felt on the other side as a consequence of an act.