It's a great game! I love the old-school feel to it, reminds me of all the old RPG's I used to play back in the day. It's engrossing and makes you want to keep going no matter what just to see what's in the next room and what new loot you'll get.
However...I do have one gripe about it. I made it to Dungeon 5, just got the Demon Hammer--which I assume is one of, if not THE best weapon in the game--and I died in the first room of the fifth dungeon and I had to start all over...that took off 2 stars for me.
I'd suggest add in save points or auto-saving after you beat a boss so that you don't have people pulling their hair out when they have to start over...or, if you can't do that make health potions more frequent or refill the HP and MP meters to full--if you really took a beating from the last boss--before the next dungeon so you stand a fighting chance and not die after one hit.