The mouse control mechanic should be so frustrating, but you've tuned it perfectly, so that you feel like you have just enough control to do something.
Great idea and a lot of fun. I like that the map is consistent, but there could be scope here with shuffling the order of different rooms to give the feeling of being lost.
For what it's worth, I found the stairs at the end of each level a bit confusing, since I hadn't needed to use the jump mechanic before. I'd say go 100% 2d if you want to keep the top down style and use metaphors that work in two dimensions.
Music is absolutely banging. Great concept too. Sometimes though I found that picking up more gold would occasionally make me go faster. Really hope you keep working on this, it's a great idea.
After the alarming installation UX written in chinese, this was an interesting game. Maybe you could include more mechanics around collecting different things, or giving a player feedback each time they collect something.
I'm a sucker for any game that uses light as part of a mechanic. Love the aesthetic. Would love to see something like this with more of a structure/win condition.
Similar to Houkime's comment, maybe you could experiment with adding a random chance of a ghost spawning even if you hit an enemy. Great idea for a game, Hope you build more out of it.