Not bad, but needs more angles on the pad and the bricks. It easy to start a level and not move, just tunnel to the ceiling and get all bonuses. I loved the pad trail idea - I haven't see it before. Very original.
Though simple and glitchy, the game is tied together by the good bg music and thematic levels and leaves you with a good feeling. 5/5 due to enjoyment.
Box - keep to the right and you'll get halfway inside the wall. I jumped and while falling saw some ground to the right and below the cube, but I missed it. Didn't bother to try again.
To do lumber just tilt the truck forward when you jump so the planks can't escape backwards/upwards. Even if you land vertical on front wheel it's OK as long as you don't turn the truck.
Very nice physics and good graphics, but also very basic flaws - e.g. the lack of lives. Also, the guy doesn't return to his default mount when I release the left/right arrows which is annoying.