You literally just tap the jar. On consoles, players often mash the X button and the touchpad simultaneously to speed it up.
It features 51 trophies, including a Platinum, which can be earned in about 20–30 minutes. My.Name.is.Mayo.Build.2840766.rar
As you tap, you unlock "stories" and outfits for your mayo jar, ranging from bikinis to cat costumes. You literally just tap the jar