Game's portal's are distribution channels for games. In other words people can download your games from a portal and buy it through a portal. The obvious reason for using portals is publicity

  1) The top 10 games in portals receive millions downloads
  2) Generate much sales.
  3) portals generally typically take 50-65% net sales.
  4) The share provides a good income especially for top games.
Gaming success – the  Top 1% – 60% portal games may produce serious money.

The Flash Version includes over 40 challenging, portals thinking levels, which features almost every feature the real game does, in 2d,3d – energy balls, cubes, turrets and even the famous crusher from the trailer. The game also includes a console to mess around with after finishing the game.