This is a short and fun experience! I like the premise a lot and it's a great interpretation of the jam's theme. The controls feel really nice to play and there is quite a lot of polish in the falling. The artstyle is really simple but it gets the job done and looks really good together! The sound design is quite good, I like the beeping warnings, the subtle SFX when hitting a cloud and the wind sounds when going fast. I appreciate the warning on where the clouds will be as well.
I guess the only improvement is to add more gameplay elements while falling. Some random elements like gust or birds or other planes to dodge could make for a more dynamic gameplay. Though I understand if you want to keep the simplicity of the game! I think it's not very replayable at this stage, it's a short and fun experience as I said.