While I'm also not aware of a shrinking game, there are more than a few[1] growing games. Some aspects of the mechanic are the same - "what was dangerous before is not a problem now and vice versa"; it's just the plot that changes.
So: in a shrinking game a small enemy will become a large threat and a narrow passage will become a large escape route - and in a growing game a large enemy will turn into a small threat and a previously large passage will become inaccessible.
> I haven’t seen anyone do a shrinking game.
While I'm also not aware of a shrinking game, there are more than a few[1] growing games. Some aspects of the mechanic are the same - "what was dangerous before is not a problem now and vice versa"; it's just the plot that changes.
So: in a shrinking game a small enemy will become a large threat and a narrow passage will become a large escape route - and in a growing game a large enemy will turn into a small threat and a previously large passage will become inaccessible.
[1]: E.g. https://en.wikipedia.org/wiki/Katamari_Damacy