2/5, 5/10
Could have been a lot better, if only you made the game less random. Don't get me wrong, randomness is a good concept when it comes to games like that, but I don't think fights should be automatised. After getting the best weapon and armour, all you do is buy divine swords and pray that you won't meet two dragons in a row. Too repetitive and simple.
Anyway, if you need some tips - try not to buy armours as fast as you can, because they can be used as a way of healing. Avoid potions, it's a waste of money. Keeping your lifespan at a safe percent is pretty important, so don't be afraid to spend some cash on it. At about 9-10 get a divine sword - that's when the dragons start appearing; they are nearly impossible to kill without it and leave a lot of money - risking a loss is pointless. Well, this should be enough to make this game unbelievably easy. Enjoy.