Flawless. need i say more?
so what if its sligtly like gradius. Its better i think. U should make a sequel man.
heres some ideas.
1. Upgrades like better armour, better weapons and support ships.
2. Difficulty. For example, -amateur- -newbie- -expiernced- -veteran- and possibly for master players -elite-
3. a choice of ship and different controls for each one.
4. and have maybe squads of men on your ship land on their BIG ship (there ship might have turrets?) and have a 2d short face off on the ship to win the game.
i know that could take awhile but its worth it believe me.
YOU COULD BE ONE OF THE BEST FLASH ARTISTS IF YOU JUST KEPT WORKING =)