"Return to the airlock! -> Victory!"
I had trouble with the movements, I kept wanting to do sidesteps instead of turning.
Having to collect 100% of the ship's treasure was a bit too harsh.
Being able to escape the level with, say, 12/14 treasures, and possibly reducing the time before the ship explodes by 30 seconds to compensate, would probably be more intense and less frustrating.
That said, I like the concept of a Dungeon Crawler with pirate boarding, and it would be worth developing the idea.