So yes, our environment artist did make all of the ship pieces in the jam timeframe! Our plan was to use post-processing to add a colorize and toon filter over the game, but due to the time constraint we have only just recently started working on that. It should be implemented when we release a fix for the stutter soon!
The reason I went with left-mouse for interact is because it is typically what I see being used in indie horror games here on itch, and is a preferred method of mine as it allows for q/e to be used for strafing, or other interactions as well since the game doesn't have any combat. The controls are listed on the game page. In a full game I would like to use context UI similar to what you would see in Zelda, and I may look at implementing that in the fix as well, as I really do think they look nice.
Thank you for the detailed response, and for giving the game a try!