Excellent game. A bit slow at the start, but I made it to level 10 on interesting difficulty before I ran out of things to spend cash on and lost interest. Please add more upgrade tiers!
This *could* be one of the coolest Flash games available, but it's so buggy that it's very difficult to finish a game and it's impossible to use the continue function from the main menu. Players should skip this one for a while and try it later when (hopefully) the developers QA this game properly.
If you can spare the time, load up on items with learning bonuses, go to the Dungeon of Mystery (DoM), and kill every single mob on floors 1-10 using light attacks. You'll hit 1000 in whatever combat skill you prefer in no time.
Once you make it to level 25 in the DoM, you'll have the skill and gear you need to kill demons in one hit. Then, with a few of the nicer potions on hand, you can one-round the final boss to win the game.
 "Betty IX"){kind=icon}
 "Tesla Death Ray"){kind=icon}
 "Corporation Inc."){kind=icon}
 "Arkandian Crusade"){kind=icon}