Spike Demons are enemies that appear in Asteroids. They come in two variants with different abilities.
The Blue demon is rather basic in its attack. Lacking a ranged attack, it can only melee the player. However, it also has the ability to teleport in a straight line at high speeds.
Red demons lack the teleport ability of their blue counterparts. However, they also have a ranged attack, making them deadly at long distance, especially when combined with other monsters.