Hey… (EDIT apologies… not sure why this is appearing above MiniLD50)
After seeing the excellent PillowCastle video, I made a demo Forced Perspective object resizing workspace… not a game as such, but if anyone is interested in making some models or creating levels, give me a shout – perhaps we can work together on something.

 http://web2.mrexcessive.net/ForcedPerspective/

If anyone wants the code including whole project environment which borrows from snippets found in various Unity forum threads, then you can download that here.
http://web2.mrexcessive.net/ForcedPerspective/ForcedPerspective.zip

The complexity (it’s not that bad…) is in FixedJointDragger.