I added some asteroids to shoot at. When hit by the canon’s shockwave they explode into smaller ones that each get a random heading.
When the asteroids get really small, they just vanish. When asteroids move out of the main (circle) view they vanish as well.
In the working sample, when you have destroyed all asteroids, the level is cleared and one proceeds to the next level. The higher the level, the more asteroids at the beginning of the level. Sometimes you even get a nice additional ‘bonus’ weapon.
( pssssttt .. the + key to add one still works )
You can see the work in progress here
I created 3 different asteroid animations (143 frames) using blender.
Asteroid 1
Asteroid 2
Asteroid 3
( everyone may use these sprite sheets 
)
You can find the blenderfiles for these asteroids here
You can see the work in progress here
Tags: Blender, Game Development