And I quote the Blocksworld the Honest Trailer:
"From Boldai, the makers of products that no one has heard of like: Raze, Brain Builder and some bloody games from before the internet comes another desperate attempt at fame and fortune... Blocksworld!"
Jokes aside, Boldai are a swedish middleware team that are best known as the first developers of Blocksworld before they were bought by Linden Labs (formerly Linden Research) in January 24th, 2013. Where they are now is anyones guess.