Being the creators of Pac-Man, Namco has put some Pac-Man references in the game.
Merry Bay in the marine resort is shaped like Pac-Man. It also looks like a missing part of a pizza.
There are 2 Pac-Man references in the City Resort. The first one, near the giant spaceship, there is a Pac-Man reference that actually looks like cheese.
In air hocey, a puckball looks like Pac-Man.