I've been using LibGDX for a small little thing, and honestly can't recommend it. I had the app for a few years, and whenever I wanted to update things after a few months, so many things would just break. Be it the build-system, the APIs, RoboVM or some randoms project settings - it was always a headache to get it running again. When RoboVM shut down, there wasn't even any clear way to get it running on iOS again for a while, leaving me with an undeployable app.
If you're investing into anything serious, I would strongly recommend going with Unity over this.
If you're investing into anything serious, I would strongly recommend going with Unity over this.