How does My Neighbor Alice work?

Could you elaborate on the functioning of My Neighbor Alice in a concise yet comprehensive manner? I'm curious to know how this cryptocurrency-integrated platform enables users to engage in virtual world activities while also leveraging blockchain technology. Specifically, how does the integration of NFTs and cryptocurrencies facilitate the player experience, and what sort of social and economic interactions can one expect within this virtual environment? Additionally, I'm interested in understanding the underlying economic model that drives the system and how it ensures a sustainable and engaging experience for its users.