Edit: The only thing that bothers me a bit is the ships' speed settings, most are too fast for me.
And no way you can destroy half of the level with that low speed...
There's some issues with visibility, the bonus items that move directly toward your ship could be transparent, and bullets could stand out better. But overall it's great fun for Caravan fans.
Also the music is awesome :P
Edit: Seems the Hunter ship needs some balancing, I was able to blow up the first midboss before it got more than 2 of it's yellow shots off. D: