This game is a hidden little gem and I really wish people paid more attention to it. There's pretty much no flaws to it, other then a few meager little nitpicks.
Now first off, I want you to imagine Tim Burton made the Binding of Isaac. Now remove anything remotely similar to Johnny Depp. That's what our Darker Purpose is. The game plays almost identically to BOI, albeit a bit more slow-paced. You collect items and level up every once and a while.
This game is a rogue-like, it has randomly generated floors, each with randomly generated rooms. Many of these floors will have a certain level-feeling (i.e. To Big, Leaderless, Power Struggle, Sensetive, etc.) that can make or break your playthrough. It's very rare that a death in this game will be the game's fault, although it won't be uncommon that your playthrough may get harder thanks to the luck of the draw present in all rogue-likes.
In short, Our Darker Purpose is a fine piece of work, and by-and-far one of my more favorite games. It has a nice sense of humour, a gorgousley grim art-style, plays near perfectly, and is hard to boot.