This game is brutal no matter what difficulty you pick, in best possible way as a rogue-like. It has a VERY surprising amount of depth for a game that is by default played on a resolution of about a smart phone (what you see in the screenshots is what you get, and full-screening it does not help its prettiness!). Graphics-wise, it's incredibly indie -- see the character "portraits" in the bottom left corner that seem to be sketches made a bored developer, especially Swordmaster Class C for a laugh.
If you get this game, it's for its gameplay, which does one thing, but does it really, really well. The turn-based gameplay with a constant timer and emphasis on movement will make it incredibly addicting for old-time Rogue-like players, as experience points (read: monsters to farm) and treasure may be within arm's reach but inaccessible due to the choices you have to make. The item appraisal system makes every item a mystery and makes even a new starting sword drop a desired reward, as durability constantly counts down with few ways to repair items and replenish supplies. Even when you're on top of the world, you'll feel pressured and challenged by item weights and inventory limits, decreasing energy and stamina, and other factors to encourage you to weigh risk and reward ("how long should I wear this Training Bracelet, which cripples my stats for more experience?") to get ready for the next area.
The "hidden" parts of the game are by far the most enticing. You simply have to go out and find out for yourself how to get access to things like Party Members, Force powers (spells), the Dark Brotherhood, Hidden Elf Villages, Goddess Statues, and Key of Seals and their associated doors. After each death or victory, the progression system encourages trial and error, mixing and matching unlockable classes and perks with rotating featured Dimensions and allowing players to access the Dimensional Vault to carry over a limited number of items. The game is well-supported outside of a playthrough with a replay system, a hall of fame for each dimension and for your overall profile, and, of course, the different daily Dimensions featured. It does not hold your hand after kicking you out of the castle with a fairy of questionable use, explaining only the most basic and necessary mechanics until you recruit party members: you have to go out and discover it for yourself, since at a base level the game is so simple! Even the limited story and simple humor is fun to discover, especially as more party-member-specific endings are unlocked.
One of the best games on Steam under $5, and amongst my favorite Rogue-likes; highly, highly recommend.