I'm not exactly a fan of RPGmaker genre of games so when it comes down to playing one, the writing/story/narrative is the pushing force that drives me to try it. It has to be REALLY good
In your game, this aspect could do with some work... You clearly have imagination for creating a narrative, but you need to polish the writing - by fixing the gramatical errors and awkward sentences first and foremost, but also by simply writing more stuff so you eventually accumulate skill and become proficient in it!
Others mentioned default RPGMaker assets, personally I find no issue in using assets in general, but in this case some of the assets didn't make much sense in the context of the game. The first thing that comes to mind is the fact that your thumbnail depicts a sort of eastern european medieval hut, while the game itself is set in a large, victorian-era-esque manor. There are more things but I'm sure you're aware of them at this point lol
But! You DID make this alone in just 7 days, and I think that's impressive on its own! Keep on gamedevving