Goal: Block at least 75% of the area

Player: The red square. Can move horizontally or vertically. Swipe anywhere on the screen to indicate the direction you want the red square to move. Anywhere. You don't really have to touch the red square to move the player.

Enemies: Black/white squares that move. They can move diagonally at a constant speed and they change directions when they hit an obstacle. Avoid bumping into these.

Blackholes: Black rectangular shapes on the board. If you surround these without any enemies inside then they get sealed and will disappear. Not present in "Classic" mode.