This has a very retro feel. Clean presentation, it was easy to understand.
The combat is a little bit clunky. Once you have no ammo left you're pretty much dead. But the punching was a nice touch. It felt a bit too random, whether the mission interests were the goal or an enemy, but I don't mind it.
The only bad thing is the font effect. It's too much for my taste. Made it way to hard to read.
Other than that, nicely done!