This is one of the best games I've seen so far. It feels really polished, short, yet full of content. It doesn't feel boring at all throughout my run. I found out about an exploit with the grappling hook that would be very interesting to do when you want to travel downwards quickly. The game has a lot of potential for further development as well - more obstacles, an ecosystem with creatures that can help/affect the operation, more resources to manage (for the whole ship to stay alive, not just the gold).
Other than that, the graphics and audio is amazing. Can't really find anything to nitpick about.