For such an early version, it seems to have a lot of potential.
One thing I'd like to see improved in future versions is the feedback when interacting with blocks. Some sounds, particles, or a clearer indication of which block you're targeting could make mining and building feel a lot more satisfying. And of course, it needs an UI as well :D
Obviously there's still a lot of room to expand since it's an early build, but I'm looking forward to seeing where you take it!