After 10 minutes of digging I managed to find one single screenshot of an actual game built with it. Isn't that the first thing a developer wants to see? https://unity.com/ leads with demos. https://kaijuengine.org/ leads with a block of text claiming it renders cubes faster than Unity.
It says on the home page it’s under development. I wouldn’t expect any games made with yet. > The engine is not released and is under heavy development.
Development includes testing. A game engine's test is games. Lack of games speaks volumes.