Celeste is a masterpiece. It's well worth the investment in beating the base game, though I did quickly give up on the significantly-more-difficult B- and C-side content.

If you're interested in understanding some of why Celeste is so important to a lot of people but don't feel up for playing it yourself, these two video essays are a great watch:

https://www.youtube.com/watch?v=0QRZyei6dBo

https://www.youtube.com/watch?v=eSxo9JnB1iI