Right. Well it was an alright game. You should defiantly add a story mode. It feels pretty pointless and random being a "Priest" just killing zombies. A story mode would add complexity to it. Next there needs to be a way to cycle through your weapons.
On that note the upgrade section needs to be more prominent. It took me a while to find it. The weapons need to be CHEAPER! It took me a good 15-20 minutes to get enough money to buy a shotgun! The money earning seems a bit random. The level 2 zombies need to give more money than the level 1 zombies. Every time you enter the upgrade section it seems to restart. It becomes super easy and you loose your current weapon.
All in all it was a good enough game. Just fix these few things it it will be great!