I just got an early access game called Crosscode which I think is adaquately described as above. It's EA but it's very stable (though I had a couple hiccups in the pre-tutorial, only in that one specific part though), and the game is extremely poished and fleshed out. The story is unfinished though, and there is more content being made still. But damn it really impresses me. I suggest everyone else take a look at it if the title interests you. The game DOES have a demo, but it's pretty much the tutorial only, so it's not really going to sell you if you weren't sold already imo. but if you're interested maybe it can say you wont be interested? I don't see why you wouldn't be though based on its gameplay.
There's a video and more info here:
http://www.cross-code.com/en/home