Overall, this is a great "deck building" game, in the style of Dream Quest, Night of Full Moon, or Slay the Spire. The graphics are fine, if painterly, and the mechanics are complex and deep. Characters feel sufficiently varied and unique, and there's a lot of breadth of content.
In fact, it's a shame that the game relies on IAP, as it would easily be worth $5-10 for the base game, and more for the expansions or DLC characters. Some Quests are annoying (e.g. the recruiting quests) and at least one Achievement is needlessly tedious ("The Chosen One"), but mostly they just add replay value.
Instead, it's clear that the Developers want you to pay for progress via In-App Purchases (IAP), as without the bonus to your XP and Gold, unlocking the full content would take hundreds and hundreds of hours. It’s a shame, too, because the game itself is not too bad. If it cost $5 upfront and another $1 or $2 for the map expansions, it would likely be far more enjoyable, but instead they’ve opted to nickel and dime players.
**UPDATE**
I do appreciate the quick Developer response, and I think it’s great that they’re adding more and more content. The new gold and XP gains are more generous than before, so I’ve amended my review to reflect that. The added depth and breadth of the new content updates—not to mention bug fixes and re-balancing—make this game easy to recommend. Just be prepared to either grind for a long time or pay cash for the full game.