Not bad for a first game. It was fairly typical of a first time indie developer, which isn't a bad thing, just means it didn't really break any boundaries; nor should you if you're a new developer.
A couple things I'd like to see different for future games:
1: The loading intro screen should be a max of 3ish seconds. Lasting 10+ seconds actually made me worried I'd crashed the game somehow and was stuck in a loading loop.
2: I'd have liked to see more stuff focusing on either the alleyway, or the job itself. Maybe the game could focus more on just walking down the alley and experiencing creepy events, or the job and dealing with random spooky stuff there, I feel that combining it just left me feeling a little underwhelmed by both.
3: Please don't do big jumpscare screaming endings. I know it's really easy, and it's a common trap for first-time indie horror devs to do, but it really cheapens the experience. I'd rather have gone down the alley to a dead end, then hear a noise, turn around to see the monster and cut to black as it approaches.
Still, don't be discouraged! You're a first time developer and a lot of this comes with experience. You did have a good atmosphere, the game felt pretty solid overall and I did enjoy what I played.