Thanks for the feedback. I agree with your suggestions.

It is meant for people who've never coded before, with the end goal of introducing programming concepts in a friendly, easy-to-understand manner. My hope is that it encourages people to explore the computer sciences in education or as a career choice.

I do plan to add more lessons that touch on other programming concepts - lists, recursion, etc... and I would also like to make the site multilingual.

I welcome anyone that is interested in contributing - the Github repo is here: https://github.com/arguello/trycode.io

And here’s my blog post on the site: http://meta.fja.io/trycode.io/