I really dug what I've played so far!
One complaint: it feels like there should be a way to restock on ammo after dying. If you go to the wrong places in the wrong order, you can dump all your ammo into monsters that don't drop any. At this point your run is basically screwed no matter how many clones you have.
The other space ship next to the starting location is a good example of this. I spent my bottom bullet clearing it out and didn't have anything left for the big monster guarding the only unlocked passage forward.