I don't even know why, but I am obsessed with this game. I have played through it multiple times. I like that its pretty repetitive and the visuals and audio are fun. It could definitely use more polish (as I think people have said).
I would probably add a background to make it more interesting and also because sometimes its hard to know when you are falling.
Really simple and nitpicky but your play button would be 10 times better if it was not just the default button (different color, sprite, or font would do the trick).
Overall, it may not be the most difficult or visually stunning, but I love its simple fun vibes.