Use webgl to generate a piece of terrain using Diamond Square algorithm. And then write the flight simulator to handle the display.
The airplane automatically move forward at a fixed speed. The user will control the bank and tilt of the airplane through the arrow keys.
Pressing the left (right) arrow key will make the plane roll to its left (right).
Pressing the up (down) arrow key will cause the airplane to pitch up (down).
Pressing the Q key will increase the airplane's speed.
Pressing the E key will decrease the airplane's speed.