Hey this kinda reminds me of the game I made, with a similar slightly engineery theme and using a dangerous vehicle. We've both taken very different directions from there though which is pretty interesting. I especially like the theme of this game, it's always nice to have an actual backstory on what's going on in a game jam game.
The art here is really nice, but my terrible pc seemed to disagree with that and I ended with a pretty terrible framerate. Thankfully it cleared up a bit every time I left the ship to go to an island.
For the gameplay itself it's a very fun concept, but by the time I finished the game (#Board-AI) it did get a bit old with the only things happening being putting out fires and flying to islands. I think a big area you could expand is in adding more ship controls and more reason to use them. For examples of ship controls you could add burners to the balloons that you need to manage, and thrusters that can spin the ship, and to encourage using these you could make the island spawning distance much higher and add threats to avoid. Some more threats could be turbulence and making the floating rocks actually damage your ship if you fly into them and make you fly out to pick them up. One last thing that could be fun, a grappling hook! It could be so fun swinging using the floating rocks and would make the flying a bit easier since I found it increddibly hard as is (that could've just been the framerate or a skill issue though).