You can do it, but easily is very inappropriate abjective to say about game making. Let say you want to make platform game with 2d gameplay and 3d elements: Yes, you can with a learning path of 2-3 months depends on your current knowledge.
As in libgdx, they have box2d, tiled, spine, textureAtlas, particle editor, ashley…
In jME3, we also have box2d, tiled, blender, textureAtlas, SDK, zay-es…
I used both, so I don’t want to start conversation about what is better cause both have strength and weak. I you ask for a resource for making 2d game:
I’m also going to post a full example of making 2d-3d platform game soon!