It was a ton of fun and really nostalgic in the DOOM feel. I played the v0.96 version. I think if two things could be improved about the game it would be to change the collision on the stairs from being stairs to being a ramp. I got caught up on stairs once or twice, but in general I think it would feel smoother if each step didn't feel like dragging feet. The other thing is that having overlapping Korone voice clips sounds a bit strange when it happens so maybe have the sound interrupted rather than playing both.
Again it was a super fun experience, and I appreciate the hard work and love that brought this to life!