I see you implemented a new save system, which makes me glad and sad at the same time.
Demo seems mostly same some rooms changed,ending message is gone.
The code needed and angle shooting to progress feels like secrets, not like early game progression it needs to be bit more obvious this early on.
The first boss improved a lot bug spawn feels like most RNG is removed from it, some attacks that seemed unavoidable can now be avoided.
Great work overall.