This game is lacking so much to have gotten badges. Unfortunate interface, no way of hotkey'ing items, the almost inability to run away from a fight when a mob 1 level above you hits you as if he has 3 levels on you, the awful stat scale system of leveling.... I can go on, but I won't. I refuse to acheive these badges due to annoyance.
inb4 you mad, you jelly
This game is definitely a 5/5. However, when you're going for hard level brilliants, and it falls down to luck whether you hit or not hit the guy going for your gem, that blows. My suggestion is make the theif's vulnerable to meteor shower 100%. When you play for half and hour on one level perfectly and it comes down to one guy touching your gem for a millesecond and voiding the brillaint, something has just gone wrong.
I like the slow down mechanic. I think most people prefer shooting whereever the cursor is instead of trying to hit the zombie right on but thats your choice. and a reload hotkey would be good. 3/5 for good first game.