The Space Dragon is the boss that appears in the eighth level of Space. It has 4 stages:

Red Stage

It avoids you and shoots a red bullet every second. If you hit it with a bullet, it will charge towards you.

Orange Stage

It follows you and shoots an orange bullet every half a second.

Yellow Stage

Every three seconds, it lets out yellow sparks for one second. Occasionally, it draws near you.

Green Stage

It summons level 2 dragons and 360 defensive dragons.