Before I begin, let me note that this game is perhaps not quite my style of game, and thus that my thoughts below should perhaps be taken with some salt.
That said, having played some of the demo--the reason for the "some of" should become clear soon--I would like to give some feedback:
First of all, I really like the aesthetics of the game. Gloomy without being dull, retro without being ugly, and overall lovely and atmospheric.
I similarly rather like the lore and setup presented as far as I got--there's a nice tragic romance to the whole thing, which I quite appreciate!
That said, I did find the early maze-like forest area to be a little unengaging after a time: while I liked the overall feel of it, there was fairly little to do or see (that I found) for a fair bit of exploration.
But that wasn't a major issue at all.
What stopped me, in the end, was the combat. (Or at least a violent encounter; maybe there was other combat elsewhere or later.)
In exploring, I encountered a strange creature, like a nervous system stripped of its body. It attacked me swiftly, overbore me, and proceeded to hammer on my prone form.
Something flashed up on the screen to the right. Perhaps due to the urgency and surprise and haste of the moment, I didn't get a good look at it--I was focussed on the creature on top of my character.
But seen just outside of my central vision I thought that it looked like an arrow, so in haste I tried a few upwards-motions. (At least of my mouse, possibly of key-presses--I forget.)
This, of course, did nothing, and I was killed.
I recovered, returned to the world, and had another shot at the encounter.
I realised--whether this second time or after--that the thing on the right wasn't an arrow, but a "press the button in this range" bar. I tried to match it--tried multiple times--but never did get it to work. I'm not even sure of which button I was supposed to press, and thus whether I was pressing the right one.
(I also had a few shots at punching the creature as it approached, to no avail.)
Eventually, I gave up.
Now, having the learning of a combat mechanic be achieved via experimentation isn't a bad thing--not at all.
However, the process of resetting the encounter is rather lengthy--long enough that it very much acts against rapid iteration and through it experimentation with the mechanics, for me at least.
On top of that, on returning to life one has only one health-point, meaning that after the first time one gets only one iteration of experimentation per death.
(Let me note here that I actually rather like the whole death-and-return sequence. I just think that it's at odds with experimenting with a mechanic that kills one quickly.)
And finally, there was little feedback (that I noticed) in the mechanic to tell me quite what I was doing wrong--was I pressing too early? Too late? The wrong button entirely?
All of this made the process of figuring out how to progress a little frustrating and difficult to carry out for me, and as a result I eventually set the game aside.
Which is a pity, as I was otherwise enjoying it.
For one, the business of either giving or taking "soul" to the dead that I find makes for an interesting choice, and fits nicely with the overall atmosphere.
All the above said, overall, from what I see, the game is a solid one and well-done! ^_^