Confirmed to also be working on the PS5.
IGN Review: 10/10
Metacritic: 92% (8.4 user score)
Matches all time low price for PlayStation Store https://www.dekudeals.com/items/celeste - may have to include the PS Console to view as Nintendo is default
See https://www.ozbargain.com.au/node/685886 - same deal posted again at Playstation for those that missed the last one (like me).