Some problems with my game

Hey there everyone. I’m new to this forum and currently making my first platformer/shooter game. I have a couple of problems with it and I wanted to know if anyone can help me.

Click the link to download the beta:
http://www.megaupload.com/?d=7HM2EUWN

I wanted to know how to do the following:

  • Make enemies shoot back
  • Make the bullets fire rapidly, instead of one at a time.
  • Give the enemies their own health, so they die in 3-4 hits instead of one

If anyone can help me with these, I’d be glad to put your name in the credits.

Thanks!

(Oh, and it’s a beta, so these are not the final graphics.)