They have a Github repo with some of the source code up (mostly just stuff to do with character movement and control). https://github.com/noelfb/celeste https:

They have a Github repo with some of the source code up (mostly just stuff to do with character movement and control). https://github.com/noelfb/celeste https://github.com/noelfb/celeste Apparently it's based on this framework: https://bitbucket.org/MattThorson/monocle-engine/src/default/ https://bitbucket.org/MattThorson/monocle-engine/src/default...