If you are using a version of the game that includes this expansion, here are some key technical points from the PCGamingWiki :
The is a competitive local multiplayer expansion that allows two players to race through levels simultaneously in a split-screen format. It features several gameplay variations: Super.Meat.Boy.Race.Mode.Edition.rar
A high-difficulty variant that pulls random levels from the massive "Super Meat World" community database. If you are using a version of the