This is a really cool start to a game, I could see it being really fun with more polish.
The menus are really great.
RN I think the controls are a little too sensitive. There were a handful of times I was wildly swinging back and forth.
There could be more variety in the sounds. The 1 second looping jet sound gets annoying pretty quickly. Adding ambient sound and music usually helps.
I'm not sure what the point of ejecting is RN? It just made it so I had to restart. Maybe ejecting when you're going to crash could give you another attempt and crashing without ejecting could be game over? I dunno.
I also feel like the controls could be simplified a lot. Using the arrows in some states and WASD in others is a lot. My thought would be... use keys to control the plane, pitch, yaw, etc., mouse would allow the player to look around from the cockpit. When you're in the tablet, you would disable control of the plane and allow the same keys (WASD or Arrows) to navigate the tablet.