2D Pixel Spaceships Kit (1.1 version)

Major Update include:
- All Spaceships sprite reworked.
- High resolution background replaced with more suitable.
- Engine sprite replaced with new 4 reworked variation.
- Added 2 new demo scene.
- New 6 Animated projectile.
- New Spaceship shield sprites.
- New 18 Planets + 13 with asteroids ring variation sprites.
- New 9 Space stations sprite with simple animation.
- New 11 Asteroid sprite (2 color variation) and asteroid particle.
- New 2 Animated sun sprite and stars background particle.
- New 9 Simple scripts for demonstration.
- New prefabs and animations.