Advanced: Building composite maps in Phaser using Tiled
"How about we build a simple RPG in Tiled? It will have one house on a map, and a black box to represent the player. It’s not as simple as it sounds. Today I’ll introduce how I chose to dynamically load content created using Tiled."
This detailed tutorial goes through the process of creating the tilemap in Tiled, marking-up all the collision regions and defining the different map states in code. Be sure to grab the resources zip file before working through it.