I tried for the 'good' and 'bad' ending, but for some reason I would get softlocked on both routes (when I tried to kill the red dude, my character would get stuck). Also I think some more save points could have been added, especially near the end when the difficulty ramps up.
I really loved the morality concept though; the different possible paths made for a good replayable experience. The stealth factor was also well implemented and enjoyable. I thought the music was pretty great too, very atmospheric.
Well done with this! Definitely the most creative game I've played here so far. I hope you'll expand on it, there's good potential.