A simple suggestion regarding the design - change the green term highlighting to something less overpowering (such as #ffc or #ffa). For me, just that small change would make an enormous difference.

I think he should keep how it is. It's so simple.

Yeah, totally agreed. Just a few changes here and there to make the colors less garish and tweaks in the padding would make the content stand out better. Other than that, it's very functional.

He launched with the right MVP.

Removing some of the clutter can make it look better and even simpler.