Since 2.0.0, the Game have move to Minetest Engine 5.0.0.
If you have not windows, you can use Content Tabs (CDB) in minetest for install blockcolor for linux, android and others. You can download minetest engine on minetest.net.
You can test online on server : Blockcolor.net:30000 . The Game is actually not finish, this is for test.