I love it! The concept is really good and its fun and different. I think the difficulty might be a bit much and that being able to pick up certain powerups to help you or for it to be easier to get the ship back upright once you're stuck at a bad angle in the air would help with that. 

Weirdly, I had framerate issues on chrome. I switched to microsoft edge and it ran perfectly. I did some troubleshooting and going to system settings in chrome and enabling hardware acceleration when available fixed the problem. 

Overall I love the concept and the game's atmosphere. Being able to sing a sea shanty is a nice touch :)