Backpack Hero (The concept is great. Where's the game?)

  I liked the idea of the gameplay but it lacks enough content to have the required replayability, since you'll end up with the same items fighting the same bosses nine out of ten times.

Like those items? Good, you'll be seeing them a lot.

 The "city building" that works as progression feels completely out of place and the "cute" design that's so common nowadays was poorly applied.

 A darker theme would suit an inventory management dungeon crawler a lot better, and perhaps a few hunger mechanics to avoid stagnation.