I love the simplistic artstyle and gameplay concept.
In the end it boils down to move randomly though, as dodging the bullets doesn't work that well and you don't know where the crates will be.
With a little more gameplay elements that steer away from the highscore aspect this game can turn into something amazing though and It's totally worth making a post jam version of this.
I imagine there could be a larger living world, different wagon types, quests that drive a story, settlements, currency and bandit hideouts. (Just throwing some random ideas here)
It's incredible how many possibilities there are with this simple concept.