I've just finished the Demo, and I must say, I liked it a lot.
The characters' dinamic flows really well, especially in their first sentences. You managed to show their personalities in just a few words, and that's the sign of a good writer.
There's this "cowboy Bebopy" tone in the game. The music and artstyle fit perfectly with the overall space-outlaws theme.
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Battle background is kinda ugly, and I can't help from thinking "why are the enemy spaceships flying backwards?" Maybe you could focus on some changes in the visual aspect of the battle system.
Simple puzzles and "look for key to open door to look for next key to open next door" stuff, but these mechanics didn't overstayed their welcome, so that's fine.
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Kinda short game, but full of cool stuff. Really liked the last area, feels like a comfty place to spend time and maybe do some sidequests =)