Rumis or Blokus 3D in the US, is a 3D building block, board game. Your goal is to have the most of your color pieces seen from a bird's eye view. Simply, cover your opponents pieces upwards while positioning your blocks in a manner that is difficult from other players to cover.
Although a casual game, strategy is hard to grasp for many gamers because it uses a part of the brain that many games ignore: spatial reasoning. Spatial reasoning is a right brain skill, while logic and puzzle solving involve the analytical, left brain.
The online Flash version only has one building plan, the board game has six building plans including a pyramid, and the interesting asymmetrical stairs. The Flash version doesn't do justice, on how good this game is because the childish nostalgia of playing with blocks is impossible to experience without the tactile and visual sensation of playing with bright, colorful blocks.
Rumis and Blockus are nothing alike and were designed by different People. However the US publisher of Blokus also publishes Rumis, and chose to tie in the stronger Blokus brand to Rumis. Blokus 3D has excellent distribution and you can find a copy in most major retail stores. The game plays best with three and four players.