The vanilla version of Celeste already has plenty of content, but in case you want more, the upcoming DLC will surely make you happy!
As one of the lead developers (Matt Thorson) confirmed, the DLC itself will include more than 100 new levels. It's quite an amazing number and it will surely keep us occupied for quite a while.
The DLC is not here yet, but here's hoping that this tweet will hype you up properly (if the previous lines didn't do this already)...