Great game overall
Exellent game, very fun and addicting. However, it was a bit too hard, it would be much better if you had more than one life or if there were continue or save points every once in a while. I don't know how long the game is, but I know I can't get to the end because you'd have to do almost everything perfectly to get far. If you could get a health pickup everytime they show up it would be a lot better as well, but with everything thats going on with all the explosions and new enemies always coming in, you don't have time to try and hit the pickups at the right moment. These are just a few ideas for you to think about if you make another one, which you should definately do. Great work, hope to see more.