I has suggestion!!!!
Thanks for the suggestion! This community is really meant for asking questions, and there's a different place for suggestions and bug reports. The "issue tracker" does that, and it's at https://github.com/google/codeworld/issues.
Your suggestion is already there, at https://github.com/google/codeworld/issues/17. Improving CodeWorld is mostly a volunteer activity, and people are constantly helping to make the site better. Maybe someone will volunteer to do this.