Totally understand. I've been thinking about this myself lately. It's great to have something simple available like libgdx b4a library to use for free. But it's not officially supported and could stop working any moment like you say. I've been tempted to look elsewhere but haven't looked much so am not sure what else I could use that would be as simple.
I have 2 big games in production (this one and the bubble one, and not forgettin the Hill Racing one and it's updates), but after these ones I'll try another engine. I've been searching and I find Godot a very good way of making games.
Back on topic, I've done some progress on a 1D pacman game:
(it's a copy/ inspired on
this)