While Titan Souls took inspiration from Dark Souls for its difficulty and title, Salt and Sanctuary did the same for its difficulty and... pretty much everything else. The main difference being, of course, that it's a 2D platformer rather than a 3D experience. But other than that, the Souls formula has been very directly translated into this new format. Salt is souls, sanctuaries are bonfires. And yes, the infamous difficulty is present as well.
And although copying a pre-existing template isn't terribly impressive, what is commendable is how well it delivers on making the combat nearly as challenging, yet also rewarding, as the originals themselves. If you've played Souls, I highly recommend checking this one out.