Nice, very nice. Genuinely feels good to grow the plane, just wish you could dodge off-screen planes a little easier when large. Maybe an indicator on the edge of the screen for a warning? Just ideas if you want to take it further after the jam :)
Sorry about my entry as it requires downloading, I used Gamemaker Studio 2 so I didn't have the web/HTML5 export option. It's only 6MB though so hopefully anyone can play it https://stridden.itch.io/it-sproots