Congratulations on completing your first game!
I liked the concept, adding fuel management to flappy bird-esque mechanics feels like a great idea with a wealth of potential.
My feedback for you, if you choose to expand the game is to perhaps add additional obstacles, obviously this is a jam and you can't get around to everything in such a short period of time, but I could totally see added hazards as a way to enrich the playing experience and improve the challenge (especially if they knock out some of your fuel).
Presentation wise the game is very readable and I understood exactly what I had to do. The graphics are cute and i like my little guy on the plane.
The game is also pretty bug free which is impressive. I think my music stopped at some point but it wasn't a big deal.
Overall, job well done and congrats on finishing your first game.