Very cute little game. Really like the character art, and the intro scene was great. Gameplay-wise, nice little balance puzzler. I think the bounce on the items is a little on the strong side, but that's part of the difficulty I guess. Just a little unpredictable.
Did notice a couple bugs. On one level, the little brother's animated tail just went all white square, and on level 3 I think, I was able to beat the stage even though the trash bag on top was still rolling down the pile, so big bro ended up climbing up thin air. Small things. Anyway, good job!