Very nice game.
Right now,it feel it is too easy. Maybe it gets harder later on, the but the first 4 floors of the game are so simple they could be condensed into fewer.
Of note, "luck" and lucky ring are unclear in their meaning/use.
The Whetstone is absolutely busted right now. Have a sword and 2 single use per turn weapons, starting by using it 2 or 3 times is insane. I ended up not using it to try to have some challenge.
Also, being able to farm mana using books against weaker enemy is feels like an exploit. Was fun to deal 100 damage per sword hit on the final boss though :)