If you've done the installation as shown at codespells, you can preview this world now by using:
(once-upon-a-time #:world (cave-world) #:aether (demo-aether))
Starting next week, I think I'm ready to start releasing builds of these worlds -- so you don't have to go through the installation process with Racket first. I think I can get the compiled Racket executable and the compiled Unreal executable to be zipped up in one nice folder for easy installation.
- Stephen R. Foster
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