Sliding Cubes Game OnlinePlay Sliding Cubes online at Infofully.com. This is a simple game for the kids of 8 years old. See the white boxes on the game screen and there are blocks of different colors as well. Your aim is to move the colored blocks to this white area and fill in space. When all the space is covered, the level is clear. Play this game in mute mode. Playing Method and Controls: You will play this game with mouse only. The player needs to move the colorful blocks by clicking and dragging them to place on the white boxed area.