Short version: i dont know if blockland has been copyed
Off topic: well my bros m8 says lego was copyed by the simpsons just because there both yellow,
On topic: it doesnt mean it copyed blockland, Both have letters looking like BLO dont mean that blockland has been copyed, CAPITAL LETTER dont mean blockland has been copyed
Extened version: well builder man made ROBLOX, maybe he rarley knew blockland