I played through and here are some thoughts.
An even faster combat speed would be nice for a lot of the early battles where neither party has quite enough to get through shields.
There's some aspects that are not obvious: ship efficiency?
Combat seems to be fairly high risk for low reward, and trading seems the only feasible win condition. perhaps being able to salvage undamaged ship parts, or higher payout for less damaged foes.
perhaps double clicking for purchasing and selling goods. drag and drop gets annoying as you clear out the ship or the outpost.
These are great suggestions! I considered double click to buy and sell, but we were concerned it would be too easy to trigger accidentally. We can give it a try though, I agree that the drag and drop is a bit tedious.
Ship efficiency is a function of how many modules you have, and is a multiplier to your cooldown progress in each module (so a ship with 50% efficiency only activates a generator every 2 seconds as opposed to the 1 second cooldown at 100%). I can add more information about this to the game, and we'll be adding ways for you to increase your efficiency with modules and potentially your ship's crew if that's added.
Trading is definitely the most rewarding path right now, I think you're right that combat rewards should be increased. I like the idea of salvage rewards as well, although it could be hard to fit into the narrative. Like if you take a ship's gun then in the next system you see them again and they still have the gun. It's worth considering though, I like the idea of being able to take a less destructive approach to try to get a higher reward.
I'm considering being able to toggle modules on and off, I've noticed sometimes it's helpful to add a module before you find the power for it, but doing so can end up disrupting your other systems and really cripple you. Being able to add a module but turn it off would be good, possibly even in battle as well.
In case it's not clear, the enemy ships are all other players. I realize now that's not really called out in-game. I think that will become more interesting when I add in things like leader boards and a tournament mode.