The red Pac-Man represents Zip, the main playable character of FlingSmash who features a yellow spherical body and a red tuft of hair.
The stage references the level layouts of FlingSmash, which features an auto-scrolling function and collectibles.
The Low Gravity hazard references Zip's ability to hover in the air for a short period of time.
The Chain Chomp Assist Trophy enemy represents the Hydracoil, a monster featured in FlingSmash that eats Zip if he stays still for too long.
Other trivia:
This spirit's Hothead Equipped ability references how Zip and Hothead are both round, yellow characters with simple eyes and red flame-styled features.