I really like the art and the game is very sweet and relaxing.
Like others have said it would have been great to have had some kind of ending. Even if it's just the ship sprite moving up out of the screen, some nice sound and a lil screen shake/rumble or something would have done it for me :P
I think an additional note would be that it wasn't entirely clear to me what was a collidable surface and what wasn't. I didn't notice you could step on the trees or on the platforms up on the ship for a long while haha. I'm not entirely sure how that could be improved or even if it should as it may compromise the art style if e.g. outlines are added to some surfaces. But I thought it was worth mentioning at least.
I know time is super limited in a game jam but I just feel like it's better to receive at least some kind of constructive criticism on what could be better as I personally find that useful, so I hope it's not taken the wrong way at all haha :)