Spin around the web destroying enemies as they emerge from its depths.
Enemies swirl around at the far end of the playfield, then enter the playfield and move toward the player. When all enemies in a level are destroyed or reach the near end of the playfield, the player "warps" to the next level by traveling down the playfield. The player must avoid or shoot down any spikes left behind while warping. The player loses a ship when an enemy comes into contact with their ship, shoots it or otherwise destroys it, or if the ship hits a spike while warping. If an adequate point threshold is reached, the player can earn a new ship. The game is over when the enemies destroy all of the player's ships.
The game consists of sixteen screens with unique geometric shapes, some of which are closed tubes that allow the player to loop around, while others are open fields that have distinct left and right endpoints. When all sixteen screens have been played, the sequence repeats with a different color scheme and a higher difficulty level, including the invisible levels (65–80). Each sequence of levels adds additional enemies that are faster and more deadly to the player's ship. The numbered levels stop incrementing after level 99 and a random one of the 16 variations will appear after successful completion of subsequent levels.