Inspired by the premise of the movie Inception and dreamscapes, Inception: Cat and Mouse is a two-player game in which the "cat" chases the "mouse", however players are not represented as these animals and are instead playing people who can blend easily into a crowd or shapeshift to match an NPC.
As the "mouse", your goal is to hide and jump in or out of people's dreamscapes whilst the "cat" is in pursuit. The mouse can only enter another dreamscape when successfully spotted by the cat and fleeing, however the mouse can leave a dreamscape whenever, as long as the last dream-jump wasn't too recent. As the "cat" your main purpose is to catch the "mouse" before time runs out. For balancing reasons the "cat" will know when the "mouse" has changed dreams and can follow easily.
This idea leads to a large variety of level design that doesn't necessarily abide by the rules of standard physics, much like the movie in which this seeks inspiration from. However, the dreamscapes are vaster in differences and can even have childish tones like the pyro-vision from Team Fortress 2, with rainbows and sparkles.
Game Features:
Inception: Cat and Mouse is only a placeholder name, as it blatantly explains both concepts used.
Reference Image: http://www.toptenz.net/wp-content/uploads/2015/02/chrisnolan3.jpeg
also quick mockup I made