Install
Most people should just download Enu and play. Grab the latest release for your platform from the releases page, open it, and you're ready to build.
That's all you need. Everything below is for people who want to work on Enu itself, not for regular players.
Building from source
You only need to build Enu if you want to change it or contribute to it. If you just want to play, download a release above instead.
$ atlas install && atlas rep
$ nim prereqs
$ nim build
$ nim import_assets
$ nim start
Notes
Enu requires a custom Godot version, which lives in vendor/godot. It's
fetched and built as part of nim prereqs.
See Compiling Godot.