First of all, for a first game this is amazing so congratulations!
It was actually pretty enjoyable to play, it took me a while to figure out i could double jump, and even longer to figure out that keeping yourself in the air was the main mechanic for the game, but once i did it felt pretty fun and seeing the multiplier go up was a good motivation.
There were some easy improvements that could take your next project to an even better spot, first of all when you make a camera that follows the player, it's usually better for it to be smoother and not follow perfectly, specially in a game about jumping, also with the camera, try to make it always focus on what's important, in this case while the flamingo is cute, not having it centered vertically and instead having the camera above it would be better so you could see the seeds easier.
as for the spin mechanic, most of the results were negative i feel, rolling for extra points would be a great incentive if you implemented a total points label somewhere, so that the player could see how good they did in the run.
as for the hitboxes, it seems like you made them perfectly accurate to the flamingo and the seeds, which seems like the correct thing to do but then hits that to the player seem like near misses become run ending, it's always better to make the player think they are better than they are by making the hitboxes generous instead of pixel perfect.
the theme is really unique (pink animal gang yay), but it doesn't fit too well into the theme of the game jam or the seriousness, yes there is a spin mechanic with the roulette but you could easily replace it with something else with the same functionality and the game wouldn't change how it's played, think if you are spinning as flavour or as a central thing that your game wouldn't function without, same thing with the seriousness. That being said i wouldn't worry about it too much, you delivered your first game in a week! and game jams are places to learn more than to win.
Finally i would recommend you try to add some more stuff for next time, from my experience audio and a custom font adds a lot of personality to a game