Tiled is an great tool to design levels and maps.
Flame also provides a simple
Tiled class and its component wrapper
TiledComponent, for the map
rendering, which renders the tiles on the screen and supports rotations and flips.
Other advanced features are not yet supported, but you can easily read the objects and other features of the tmx and add custom behaviour (eg regions for triggers and walking areas, custom animated objects).
You can check a working example here.