I love the graphical style - the simple 3d elements combined with some great looking 2d characters. And can't complain about that title screen! (expect maybe the white title blending with the soft blue background...)
Interesting idea, dividing the game straight in half with managing both the box holders and the box catchers. Multi-tasking is a challenge for me, so I tried my best and stopped at around 300.
What would be needed is more indications of losing lives and overall UI work, to make some things stand out more.
Good entry nonetheless! Really nice game you have here.