I quite enjoyed it. I like the art style, sounds and music were just fine. I had a few complaints about inventory management and it's got way more randomness than I like but overall it's not bad. On easy you can definitely beat the game in 4 or so hours. But as much as I don't like randomness, it definitely adds quite a bit of replayability. That makes me feel like it was money well spent, especially on sale. It's good but not great and definitely not fantastically amazing so I think it's a solid 3 stars.
I often get frustrated with remakes because they change too much. I know the original game had problems and bugs but for a lot of older games I've enjoyed, those just add character to the game. So I often wish that remakes and remasters of games would leave all that other stuff alone and just update the graphics. I think this does just that. The graphics look fantastic will still having a pixel art feel to them. The UI is clean and easy to read and use and yet the core gameplay is just as I remember. Maybe it's not exactly the same (it has been a while since I played the original) but it's close enough for me. I look forward to the release of the full game and had a lot of fun with this demo.
Let me say the good stuff first. The game looks nice and it was fun. Now the bad stuff. It's short. It can be finished in an hour give or take 30 minutes. I've played free demos longer than this. And when I beat it, it basically just told me to go buy Bright Memory Infinite which increased the feeling of "Oh I just played an expensive demo". It's story is virtually nonexistent and the little bit it has is super confusing. There's a girl and this building blows up and she gets teleported and there are monsters and some guy named Carter. That's about all I could figure out. It's got some free outfits for the main character but it's a first person shooter so outside of 30 seconds or so during cutscenes you will never see that outfit. If this was a free demo, I would play it and then be interested enough to go buy Bright Memory Infinite. But this "game" wasn't free and wasn't worth the money I spent on it.