I just went through the whole 4 minute tutorial. It was really amazing what I could achieve and everything in Retool worked perfectly.
This is incredibly polished and amazing and great. Well done!
Only thing I wanted was a dragger on the right hand side of the table so I could pull the table to be wider.
Also, I'm wondering, it looks and works so great, and the UI has so many parts, what did you build it in?