I like the pixel art aesthetic! It gives the game such a neat look, and the gravity-swapping is a nice mechanic.
One thing that caught me off guard was the directional inputs flipping when the gravity shifts. It makes the platforming a bit tricky to master, so keeping the controls consistent might help the gameplay flow better. Also, I think a slightly more guided tutorial or some extra onboarding would be a great addition to help players get the hang of the mechanics right from the start.
The audio is solid and fits the vibe well. Keep it up!