A cool concept
First, don't be so hard on yourself--i've made several a shitty game. Second, idea behind this is pretty cool. Simple, easy to understand, engaging. Where this game could use improvement [other than aesthetics, of course] is with controls and variety. I definately would make it so that your little character can move while the boxes are in motion--makes it more frantic and fun. And also a few different bad-guy's/powerups would add replay value. Keep at it.