This is the most creative hack of Celeste I've played. It's super cool! It also happens to be the hardest hack I've played. I assume but the difficulty is intentional, but I recommend tuning the enemies a bit, as they shoot super quickly, and the one hit kills make it super easy to die.
Thanks for the feedback! Yeah, most of the enemy balance was around the player's movement speed, which was matched with the original Celeste. I can try to fiddle with the enemy timers, but in a lot of levels, the easiest route is to just hop over the enemy after they've fired. :)