I love the handcrafted nature of My Map! But as someone who likes a guide with my creativity, maybe there could be something to encourage players to draw a map to a special place of a specific type? Or even just a prompt like "Think of what you want the most right now, then draw a simple map on the reverse side of this card that leads someone to that special place"?
But then, in the few moments that I took to reflect on the game, my brain went there...which means maybe that's the magic of this game: that it subconsciously gets players to produce their own prompt!