Yeah, as you mentioned the game takes a long time to load.
Based on what i have seen i can imagine what caused your game to be so big.
I think changing the machine gun and bomb input to the mouse, having two hands on the keyboard is a bit odd.
The flight controls are pretty solid and easy to understand.
The game's looks and audio are alright, a bit glitchy, but that might just be because its a web build.
Overal a good job, it works well.