This game has the potential to be awesome.
That said, it sucks as of now. MANY things must be fixed: the ammount of AP gained normally should be higher; items are too expensive and having to UPGRADE to buy more items is ridiculous; and last but definitely not least, the weapons are completely unbalanced. I got to day 60 as hunter and I only got 1 weapon better than the starting one, which failed to damage the highly armored enemies.
So; make things cheaper, give more AP, remove the smith Upgrade (make 5 or 6 slots permanent) and fix the rewarding system so that we can actually get more weapons.