Okay
It's a pretty simple game here, it's not bad but then it's not that intresting either, you need to put more than just simple shooting in this, maybe some blood and some score to go with everything, it would make it more intresting. As well as being attacked back and haveing helth or a counter which tells you how long you took then you could have high scores.
The drawings for the enemies are good although they could do with a little more animation to them, the backgrounds, well I don't really like the fact that you used photos, it would have been better if you drew your own backgrounds and everything.
Overall, you have a good base idea here, I just really think you need to expand a little more in terms of gameplay and looks in some cases, but not too bad, keep working at it :)
2/5
<3