Hello from tonight's stream!
I did enjoy the theme and atmosphere of it, but I felt the controls end up being too wild once you get everything involved. The moment I had to move up or down, it just became inevitable that I would die from going out of bounds. Similarly, I had see times where I thought I wasn't out of bounds but then the game would say I was. This happened more often when I was on the right side.
I'd like to suggest that when moving up or down, the controls will stabilize themselves. That way, attempts to get back on track and overshooting it won't happen. It's not so bad when left and right, but I find up and down just pressing lightly leads to wild changes in ascending and descending.
One thing that may also help is a life system. Perhaps where the player can survive outside of the bounds or when in the gaze of the monsters briefly but not forever. Then you can add power-ups that restore health or perform other functions.