Great visuals, good implementation of the theme. Not sure about the music and voice over. It's cleverly done, but it does not really feel like the right game for it. Makes me feel like I'm in a western of sorts.
I also found the game quite frustrating to play, it's already pretty hard to catch the boxes which are then lost on the smallest of touches (even like another box being flung into you). But the worst were the asteroids with the big radius. You cannot see the trail of those the entire time so often I would just get blindsided by them.
Might also be that I just suck at this great looking game :P
But I'd appreciate to be able to avoid the asteroids, which is perfectly doable for the small radius ones because you see the entire trail, the big radius ones are messing me up though.
Great job on the game !