Till now I have developed platform games in which a player can only move and detect tiles linearly. I wonder on how to implement games in which a player can move on an inclined or irregular surface.

I use libgdx to develop games and Tiled Map Editor to create level maps.

On research, I found RUBE is something I need for what I want to do.

Is this true? I will have to use Box 2D if I want to make such games.

Can't we do it using Tiled? If so... how to detect collision in that case?

If there is some other way through which I can do so? Thanks in advance for any suggestion.