Thank you! My biggest inspiration for Full House is the Castlevania series, mainly Symphony of the Night. I recommend all of the Castlevania games a good deal, but Symphony of the Night (along with the original Metroid) is the game that really pioneered the genre. If you're looking for something more modern, check out Hollow Knight and the Blasphemous series - they share a lot of influences with Full House, and I cannot stress how high quality they are.