Space Defender is a typing shooter. To play destroy the rockets by press the key that corresponds the the rightmost letter on top of the rocket. The slow field generator is the red circle that is in the middle of the screen and when enemies (including bosses) go near it they will be slowed. Increasing the power of the slow field will make the enemies go slower. Enemies will move and spawn faster after every level. You cannot get hurt on bonus rounds. On boss rounds defeat the boss and the level will end. There is a boss every 3 levels and a bonus round every 5 levels. The 2 yellow lines near the right sides are sheilds and they will absorb 1 hit each and they will regenerate after each level.