Is my world copied from roblox?
No, the sandbox game with high degree of freedom is a game type, not a patent of roblox. I don't know the sequence before and after the release of these two games, and I haven't played roblox, but the launch of roblox is still very different from my world, which can be seen from other geometric figures of roblox. It may be similar in part, but the two games have parted ways in basic content.