I liked the ending, but it draaaags on way too much. Forcing the player to walk through tunnels where they can actually get lost is just infuriating. And there are way too many jump scares — after the fourth one, you start expecting them.
The sound design is above average, but I was expecting voice acting for the dialogue at the beginning. And overall, it would've been cool to hear the hero talking to himself.
Overall, it's a good game — I liked it. There's room for improvement, you did a great job.