The Hello Kitty ♥ Pac-Man video game was first released in 2017 as limited-time event for Pac-Man + Tournaments. It was later republished in 2020 as part of the World's Smallest Tiny Arcade line by Super Impulse. These are the features found in the Hello Kitty game that differ from the original arcade:

All mazes have been changed in unique shapes and colors, such as one resembling a rubber duck.
The ghosts have white bows on their heads.
Some levels only feature three ghosts instead of four.
The giant Pac-Man in the first intermission is replaced with Hello Kitty; this is the only time she actually appears in-game.