I'm not gonna lie, I found it kind of fun for a little bit.
But it definitely has to have some tweaks if you plan on releasing a second one.
First of all, that slowing effect when you get hit is just too powerful. You can't get away, because they'll keep hitting you, and before you know it, you're dead. You can't even turn around half of the time to attack them back, because when they're close enough to hit you, you're usually too close to hit them back for some reason. I had no problem with the guns, though I didn't really get too far into the game to buy many.
I enjoyed the running up to them while shooting then meleeing them. The ability to use any three of your weapons at any chosen moment easily was very nicely done.
Also, not that it affects gameplay, but you should have someone fluent in English spell check your work, as I saw quite a few typos/mistakes.
Other than that, I had a bit of fun with this and am looking forward to a sequel which will have fixes and be improved.