I love this! It's not easy to make a paper-airplane game and make it control nice, but you guys did it. It's definitely not easy, quite hard at times, I think the difficulty might ramp up a little bit too soon, but it feels good all the same.
The tone and atmosphere of the game is top-notch. The wind, the dynamic music that swells after ignition, the blue skies and vibrant islands. I'm surprised it ran this good on web (despite some loading stutters here and there). I definitely think there could be more of a leadup when the boost happens, just so you can keep track of it and plan the routes you take better? Might go against the spirit of the jam, tho.
But yeah, the sound design and world are the definite stand outs here. I'm surprised you guys managed to do all of this in just FOUR DAYS. Amazing job!!!!