1: Why am I collecting swords? 2: The levels take about 10 seconds to complete. That means, that with 10 levels, it takes under 2 minutes to finish then entire game?! There is no difficulty curve. I never wrecked, never missed a "sword", just flew through every level easily.
I like your spin on a physics based game. The speed of the truck and surprising twists on the tracks makes you really pay attention to what you are doing in each level. It would be great to be able to upgrade the truck though. Upgrades like: Depth of truck bed, damage the truck can take, etc. Good game though, I like the concept.