There are a few clips floating around on the internet of a game called Pillow Castle. Many people are dubbing this the next Portal in the realm of creative puzzle video games.
If you know nothing about Portal, well then you should. Portal is primarily comprised of a series of puzzles that must be solved by teleporting your character and simple objects using a device that can create inter-spatial portals between two flat planes.
Pillow Castle takes that a step further. This game uses forced perspective as a puzzle. Have you ever used perspective to make some large building in the distance look tiny between your fingers? This is the primary mechanic in the game. You used forced perspective to make objects (or your character) bigger or smaller based on your players perspective size of that object.
It's hard to explain, but easy to understand when you see it happen. Check out the video and let me know what you think!