I would consider this sort of like a 2D Bastion, which, for me, is high praise. It doesn't have quite the uniquely immersive experience that Bastion does, but the gameplay is a bit more varied and enjoyable. Though it's RPG-ish, it also has platforming and arcade-like combos and boss rankings. There are two playable characters, Wyatt and Reina, and I've found both to be lots of fun. Another two character will be patched in later. With the decent campaign length and many build options for each character, there seems to be a lot of replayability.
The story has a pretty broad cast of characters for what it is, though admittedly, outside of the main characters, they don't have much depth. Many of the characters are evidently named and designed by backers, which is a thing that concerns me about Kickstarter projects generally (backer perks bogging down the creative process), but it seems to "work" in this case. The main plotline is decent, and not quite as generic as you might think from the synopsis about a struggle between gods of light and dark. The way you fight both angels and demons also reminds me of Darksiders, while we're on the topic of specific game comparisons.
The music is awesome. I was actually surprised at how much of it there was and how creative and well-developed some of the melodies were. The art style is your typical cartoony indie game art. Both have a slight JRPG flair to them, which to me is a good thing, but YMMV.
The dialog could use a proofreader. That's another thing that reminds me of Darksiders, heh. It's the little things, like a comma where there should be a period, or no comma where there should be one, etc. And please, for the love of God, stop putting exclamatory dialog in all caps. It looks amateurish. Still, some of the dialog manages to be pretty clever, IMO. "You know, instead of giving you these books I could just punch you in the face." Maybe I'm easily amused.
Overall, it's quite a fun game, so anyone thinking about picking it up should think about picking it up a little harder than they did before, because I think they should pick it up too. That's how a drill works.