Still it is impressive to create something complex like this in a matter of 4 days (looking at the commit history). And it is a good start to develop a full fledged IDE.
The more advanced features like syntax highlighting & autocomplete unfortunately are missing. I did not run it (I am on macOS) but I also expect there is no debugger.
Now I also want to share my childhood story: I started my dev journey first by using Turbo Pascal and then by switching to Delphi 7. Delphi was pretty much like VB6, you designed an app by dragging and dropping components on a form. My first app that I have created was a Notepad++ clone, I still keep the code for it but it is so awful that I cringe every time I try to look at it.