I really don't know why people are insulting it either. That and the one with the blue hair shows improvement. But dude, you need to think about my advice with the mediums to mix with your paint. And your strongest paintings are definitely your most emotional.
Clever title on aging. As far the message goes you hit the right point; letting the viewer know exactly what you're trying to convey without being too mysterious about it. The composition is strong; good choice with the position of subjects.
I'm feeling that you could have used more colors in this painting considering your style and that you blended just a little too much. With using more color the emotion behind the concept, I feel, would have come off a little stronger. I don't know, I feel like more blues and purples would have really added some more dimension to it. Otherwise, it's pretty tight.