I like the speed and compactness of the UI.
Hopefully constructive feedback.
1. That message about upcoming feature obscures the code and is actually a big div taking the whole right side, from top to bottom, which blocks events like scrolling with mouse wheel. It's white so it looks like part of code but blocks scrolling of code.
2. those circular things are a gimmick in my mind. And acting on hover is confusing: I move the mouse and things flash wildly.
Give me a clear option to permanently hide the circular thingy.
Only act on click, not mouse over.
3. When I clicked on an enum definition (e.g. in postgres parser) I expected a way to see all places that use that enum. It's not possible or I'm missing something.
4. The "search everywhere" dialog is confusing. Again, a big circular thingy, invisible cursor so I don't even know I can type something and I don't know what I'm searching there. File names? I expect search to be full text search of all files.
5. I was confused by `C-u`. Now I get that it's `Ctrl-u` but make it more obvious . At least in help use the full `Ctrl-u` and add tooltips with full version.
6. The color of tabs is the inverse of what I expect based on pretty much all other software I use. A current tab should have the same color as the panel, so that it looks like it's part of it. Since panel is white, selected tab (e.g. History vs. Tree) should also be white. It's black. Or find some other way to make it clear which tab is selected.