I've played my copy a lot the past few weeks. In fact, I progressed from barely-out-of-the-tutorial to game-complete* in a that time. It's indeed a great game; but not without its issues I'm afraid. Once you unlock the harder dungeons you'll realize what I mean, I believe. But the issue arises from maps with multiple boss enemies, sometimes with wildly different traits and thus requiring different approaches.

For example, if you find the Super Meat Man boss while using the Beserker or Monk classes, I weep for you. For different reasons, both of these have a hell of a time against that thing. Or if you don't find good glyphs for the map, like a Maze type without Endiswal or Weytwut, or not having Wonafayt in a map dense with low level monsters.

Even then games are still beatable, for the most part. But the strategy required depends heavily on these random drops, and you're not generating the world as you go. That's where the puzzle-like nature of DD comes up; as the player, you don't know what's hiding in that patch of darkness, but all the rolls have already been made upon map generation. And the harder dungeons reduce the margin of error you can navigate. And some of the unlock requirements are insane. Beat a 3 non-undead boss map, with the health-potion spamming undedad overkilling Priest, as a health potion factory of a Halfling WITHOUT DRINKING ANY POTIONS?! Just... Dude. (I did it though, it's definitely possible, but damn that's hard.)

Anyhow, I still like the game. A lot. And since I've been playing it so recently, you can PM me about strategies and stuff if you'd like. I'm nowhere close to a great player, but I've collected a few tricks. Oh, and get back to us once you find the Gaan-Telet dungeon.