Preheat oven to 350°F. Line a 9x9-inch baking dish with parchment paper, including up and over the sides for easy removal.
In a medium bowl, combine the graham cracker crumbs and melted butter. Stir until the mixture resembles wet sand.
Press the mixture evenly into the bottom of the baking dish, using the bottom of a measuring cup or glass to press it into a firm crust.
Sprinkle the semi-sweet chocolate chips, peanut butter chips, and white chocolate chips evenly over the crust.
Evenly pour the sweetened condensed milk over the candy chips, drizzling it evenly.
Top with the shredded coconut. Then, sprinkle with M&M's.
Bake for 28-32 minutes, or until the edges are golden brown and the center is set.
Remove from the oven. Sprinkle with more coconut.
Let cool completely in the pan before cutting into bars.