This is one of those simple but effective game ideas that make you go "why didn't I think of that" The speedy-boi that steals your key was a great enemy type.
I hope you will keep working on this game, I think it has potential.
I like the fact that you didn't use a time rewind theme 👍 sadly, I have an error at the end of the level :/ But I like the gothic like vibe, this would make a good horror game