This game wasn't tested.
Seriously, I could go through the WHOLE GAME with JUST melee weapons. Only reason I bought any ranged weapons were just for backup (how reversed, right?). The chainsaw is way past busted thanks to its moderate power plus its insane "fire rate." The lightsaber... freaking hell. I took out multiple rows with one swing. The weapons are VERY unbalanced. Look into this and tweak things.
Game play is so-so. Nothing new. Nothing ground breaking. All just another copy of zombie survival. Of course I doubt there's very few ways to make zombie killing fresh nowadays.
The game is bugged at the last level; it doesn't progress or end after the last zombie. It just sits there and keeps going with the music. I can attack any everything. Get this bug fixed.
Really, this game felt just horrible. This is another example that people need to test their own creations and have friends test them as well before making them public.