The game currently has a Mixed (65%) rating on Steam. Granted, some negative reviews are shallow, but some mention important issues. Regardless, a Minecraft clone is not exactly groundbreaking in terms of gameplay.

This is to say that technical merits are rarely good indicators of a good game. As a gamer, I don't really care about the game engine, and even less about the language it's written in. Good programmers often obsess about these details, but it's easy to miss the forest for the trees, which is what I think happened here. Game design is a separate skill from game development, and not many people excel at both.

Still, it's great seeing this here, as the technical achievements are quite remarkable.