Gotutor an online graphical debugger for Go

This is a pretty interesting visualization tool!

I had a few ideas for some areas for improvement:

1. Interactive Debugging - It would be great if users could click through the code line by line to see how execution flows.

2. UI Improvements – There's a lot of whitespace. Consider:

   - Moving the title to the top left to free up space.  
   - Flattening the buttons for a cleaner, more modern look.  

3. More Context – A brief explanation of why visualizing goroutines is useful (e.g., debugging race conditions, understanding concurrency) could make it more accessible to newcomers.

4. Goroutine Analysis – Could be cool to highlight:

   - Goroutines that are still running after execution ends.  
   - Common concurrency issues like improper synchronization or goroutine leaks.