I think I'm going to say what a lot of people did
It has potential.
Some things you want to consider:
1) Music (definatly a mute button along with that)
2) Upgrades, such as different modes to shoot, health or bombs. You could do fly in ones like in Raiden X or have ones that come at the end of the lvl (which leaves more room for bigger and better upgrades)
3) better steering, I get what you were trying to do but I (on a laptop) died 3 times within the first 30 seconds because i'd spawn with 10 bullets and a barrage of oncoming planes.
4) And the voice things, I could barely understand them until I realized there was text to back it up. It just sounded really muffled.
well thats all i have atm