promising but not quiter there
I'm sure you're going for the hardcore gamer, and I will probably get shot down for this, but I think the game starts off far too difficult.
The game has a lot of promise, I like the style, the controls work well and it runs nice and smoothly - however you get dropped in at the deep end with pretty much no chance for survival.
The problems I saw - from the few levels I played are...
- the orange enemies are almost the same colour as their explosions, so you have trouble distinguishing enemy from special effect.
- The blue enemies bullets are so small you can't see them to avoid them.
- Everything moves so fast (that could be related to old age though)
I think with a few simple changes (bullets you can see and a gradual difficulty increase) I would have rated this a lot higher - a 9/10 even.