a lot of work went into that one clearly and is quite fun to play as it is.
but I think you should be more restrictive with you colors and details, because the game is really hard to read with everything that is going on. like the background details are too present and I wasn't able to figure out if the enemy ships were color coded? so a little visual polish would go a long way.
I was definetely reminded of the legendary Ikaruga (and I kept wondering if it was an inspiration for you)