Cool! I feel like you could go further and let the student control the transfer to text. Give all the built-in functions both icons and names, and let student-d

Cool! I feel like you could go further and let the student control the transfer to text. Give all the built-in functions both icons and names, and let student-defined functions be icons they create if they want. The point where it's less cognitive load to use text is going to be different for different students, so let text-based coding be a tool they discover, not a requirement imposed on them.