Congrats on a launch, sounds like your implementation is quite thoughtful. In fact limiting to only shell helps focus on what you're giving - 1 second of compute with 1GB of RAM, for free. Who knows what scripts people will try? I think sharing those scripts would be interesting. In that vein, sharing from you to your users, consider providing some example scripts that demonstrate the fiddly differences between base images.
Thank you! I'm also excited at the possibilities and today you can share "long links" (with all the data embedded in the URL's fragment) but in the future short links with storage on the server or loading from a gist for example would be another cool feature. And having a variety of interesting examples ready to go like you mention would be nice too. There's almost too much there that I was worried I would never ship and would still be playing with examples. For fun, here is the most basic version of compiler explorer https://programexplorer.org/#s=eyJjbWQiOiJzaCAvcnVuL3BlL2luc...