I like that you made the level be out of control instead of the character which makes it much more playable and enjoyable. I think the flashlight was effectively unnecessary because you could see everything well enough and, with time, the gravity changes become just a nuisance if there is no danger involved (maybe some objects that shouldn't be touched? Although then the gravity changes should become slightly predictable, maybe with a two-second alert beforehand or something).
The final solution gives the demo a nice hook and leaves a fun impression, although of course this can't be solved if you don't have a minimal idea about coding. Introducing stuff like this slowly could make this a fun game!
All in all, honestly a great demo for being your first work in a game engine. Hope you keep it up!