WilliamIsMe1/StarcaveClient ? reverse-engineered prompt

Build me a Java client for a game called Starcave.

I want it to feel like a real game launcher and client, with a clean opening screen, a simple way to get into the game, and a polished look that matches a space theme. If there are already game screens or network pieces in the project, connect them up so the app can actually run end to end instead of just showing placeholders.

Make it easy to use, with sensible defaults, clear navigation, and basic error handling if something goes wrong. If you need to look up current Java or game client best practices online while wiring it together, go for it. I mainly want a working, nice looking client that can be opened and played without extra hassle, and that feels like the start of a real game rather than a rough prototype.