Nice take on a classic concept
At heart it was a standard space shooter, but it was a well made game with a few nice touches that made it stand out.
Great graphics all round, clearly time had been spent creating all the different enemies and items. The background was impressive, I liked how it was bright and colorful without distracting from the gameplay.
The controls took a while ot get used to, I think the decellaeration could have been a bit faster, I often found myself gliding into enemies unexpectedly.
A problem I found with the shooting is that by having guns on each side, the bullets could quite easily go to either side of an enemy when perfectly lines up with it. A central gun with side guns as upgrades would have been prefereable.
Good sound all round in the game, nice chpice of music and approproate SFX.
The cutscenes gave the game some characater and were well animated, if a little static at times. The voice acting was decent but let down by terrible sound quality, without the subtitles they'd have been difficult to understand at all. I think this had quite a big effect on the games overall quality.
The difficulty was good, challenging but accomplishable after some practice. Liked how I could restart from unlocked levels, would have got boring redoing the same ones. SharedData saving was a bonus too.
There's clearly some great coding behind this, maybe just try something a bit more original and you'll get more credit for it.