I tried it a couple days ago and so far my main gripe is that I am not all that familiar with Scala, which anyway seems like a great language. The project seems very well enginereed and the maintainer is very friendly (there is a Discord where you can ask questions and chat a bit). I'd recommend you to try it if you are curious about Scala.

As a side note, it's quite exhausting to enter into a random HN post and see that most of the discussion revolves around some negative comment that required zero effort. Not only the JVM aspect is completely irrelevant for this project, but this is an engine geared towards making 2D pixel art games for fun, not AAA games.