Overlap Sprite vs Group

To check overlapping for sprite vs group or group vs group, you must first enable physics for the placed objects.

Code:

"use strict";
"use strict";
window.OverlapGroup.state.menu = {
    create: function() {
        //create all objects and enable mouse drag on the box
        this.grass = mt.create("grass");

        this.box = mt.create("box_simple");
        this.box.inputEnabled = true;
        this.box.input.enableDrag();

        this.text = mt.create("Text");
    },

    update: function() {
        //set text to blank
        this.text.setText('');

        //if the box overlaps any of the grass sprites, callback function sets different text
        this.game.physics.arcade.overlap(this.box, this.grass.self, function(box, grass) {
            this.text.setText('Yay!');
        }, null, this);
    }
};

Mouse drag the box over any of the grass sprites.

Full sample available here.