This is an interesting concept, and I loved the art, music and sound effects! This felt really cohesive as a game, all the pieces fit together very nicely, there's some great teamwork behind the scenes!
In terms of design; it seems that by continuously pressing R one's able to read the manual at their leisure, though figuring out that putting the thrusters and pulling the left control a bit buys you more time to read the manual was a nice piece of puzzle solving. The manual is hilarious! I love the little drawings on it.
I liked how the controls work, it feels frenetic trying to get the plane to behave; if there's anything that felt a bit unfair, it was the speed apparently decreasing no matter what (eg couldn't be increased by going down then up). Everything else felt like going out of control as a consequence of what the player did, which was great!
What's most impressive is how there is a strong common vision going from design to art, UI to music, controls to writing; Great teamwork!